referring now to fig1 - 6 , a connector holder system 10 is shown . system 10 includes a fiber optic connector holder 14 which holds a first fiber optic connector 12 . system 10 maintains first connector 12 in a protected and organized manner for later connection to a second fiber optic connector . system 10 also does not require a fiber optic adapter for holding the first connector 12 before connection to the second connector . with system 10 , a connector only approach is provided wherein only the one or more first connectors 12 are held and maintained ready for connection to an adapter and one or more second connector as desired by the user . holder 14 includes a base 16 and a housing 18 . housing 18 defines a pocket 20 for receipt of a distal end 22 of first connector 12 . pocket 20 also receives an adapter as will be described below . holder 14 includes a clip 26 which clips to first connector 12 to hold first connector 12 to holder 14 . as shown , clip 26 clips to a rear 24 of first connector 12 . clip 26 is located at end 30 of holder 14 . clip 26 is u - shaped and includes two clip arms 48 . as shown in fig7 - 12 , an adapter 36 is inserted into an opposite end 32 of holder 14 for mating connection with first connector 12 . adapter 36 is inserted along a longitudinal axis 40 into pocket 20 and latches to first connector 12 . adapter 36 is not latched to holder 14 wherein movement in the axially direction would be prevented . instead , axial movement is controlled by clip 26 mounted to first connector 12 . adapter 36 includes posts 46 which slide along slots 28 of holder 14 to provide proper alignment with first connector 12 . pocket 20 does provide some support to adapter 36 . the main fixation of the mating connectors and adapter is between first connector 12 and holder 14 . once adapter 36 is mated with first connector 12 , a second connector 50 is mated with adapter 36 . see fig1 - 16 . once second connector 50 is mated with adapter 36 , fiber optic signals can be transmitted between a first cable 54 and a second cable 56 . once both connectors are mated to adapter 36 , the fiber optical fibers within each of the first and second connectors 12 , 50 and cables 54 , 56 are in optical alignment . if desired , second connector 50 can be pre - mated with adapter 36 , and then the combined adapter 36 and second connector 50 can be inserted into holder 14 for mating with first connector 12 . first connector 12 includes a shutter 34 for protecting the user and others before connection to the second connector 50 . second connector 50 also preferably includes a shutter . holder 14 includes an rfid tag location 42 for holding an rfid tag , if desired . holder 14 can be provided with holes 44 ( see fig5 and 6 ) to allow for rfid tags on the connectors to be read while positioned in holder 14 . rfid tags allow for identification of specific connectors and adapters . holder 14 is shown with a closed housing 18 defining pocket 20 . housing 18 is optional if desired . an open topped base 16 can be provided . holder 14 can be used as a system demarcation location . in some implementations , first connectors 12 cannot be removed , if desired . only adapters 36 and second connectors 50 would be accessible in that case . referring now to fig1 , adapter 36 is shown separated from first connector 12 and second connector 50 . in use , connectors 12 , 50 mount to adapter 36 with latches 60 . during insertion of connectors 12 , 50 into adapter 36 , shutters 34 lift up exposing the optical fiber inside of connectors 12 , 50 . further descriptions of the functions and structures of first connector 12 and second connector 50 and the mating adapter 36 are shown in u . s . patent application ser . no . 61 / 758 , 021 , entitled optical fiber connection system including optical fiber alignment device , filed jan . 29 , 2013 , and wo 2013 / 117598 , published aug . 15 , 2013 , the disclosures of which are incorporated by reference . the first and second connectors 12 , 50 and mating adapter 36 are shown in the drawings as one example implementation . it is to be appreciated that other connectors and adapters could be used as desired wherein the connector ( for example , lc , sc , mpo ) is mounted to a holder configured to mount to the connector , instead of the adapter . referring now to fig1 - 20 , a mounting arrangement 70 is shown with a plurality of holders 14 . holders 14 can be separate elements held together with a mounting structure , or mounting arrangement 70 can be made with integrally formed holders 14 . a single holder 14 or a plurality of holders 14 , such as mounting arrangement 70 , can be mounted to a tray , a panel , a module , a cassette , a chassis , or other telecommunications equipment , as desired . in the example implementation , clip 26 is releasable for removing first connector 12 . other mounting structures can be used instead of clip 26 to mount first connector 12 to holder 14 . fig2 - 24 show various implementations of mounting arrangements 70 including a plurality of holders 14 , either separately mounted , or integrally formed therewith for holding a plurality of connectors prior to connections with an adapter and a second connector . the mounting arrangements 70 can be movably mounted for improved user access too , as desired . referring now to fig2 , a first tray 100 is shown including a mounting arrangement 70 in the form of a single row of fiber optic connector holders 14 . first tray 100 can include other cable management structures 102 such as a cable pass through 104 and a cable storage area 106 . referring now to fig2 , a second tray 200 is shown with a mounting arrangement 70 in the form of a single row of fiber optic connector holders 14 . second tray 200 includes a tray base 202 and a pivotable cover 204 . posts 46 on adapters 36 are held in slots 206 when cover 204 is closed . fixation is by the first connectors 12 ( not shown ) within the interior second tray 200 . slots 206 provide an additional load bearing structure in situations where an extra load may be placed on second connectors 50 and cables 56 . however , the engagement of posts 46 and slots 206 does not interfere with the fiber optic signal pathway alignment between the first and second connectors 12 , 50 , since the primary fixation is by tray 200 , holders 14 and first connectors 12 inside of tray 200 . posts 46 allow for rotation of adapter 36 to help avoid stress on the fiber to fiber alignment . adapters 36 can be removed from the interiorly located first connectors 12 by engagement with buttons 210 . button 210 engages the connector latch 60 on first connector 12 disposed within the closed interior of a rear portion 212 of second tray 200 . referring now to fig2 , a panel 300 is shown including a plurality of rows 302 of holders 14 . holders 14 are provided in mounting arrangements 70 which are pivotable up and down relative to one another to allow for connector access . such pivoting will also allow for improved access to individual rfid tags associated with the adapters 36 , and the related connectors 12 , 50 . referring now to fig2 , a mounting block 400 is shown with a plurality of rows 402 of holders 14 . as with panel 300 , mounting block 400 also includes a dense arrangement of the adapters 36 and the first and second connectors 12 , 50 in mounting arrangement 70 . rows 402 pivot about an axis which is parallel to the connector axis for each of the connectors for improved access to the adapters 36 and connectors 12 , 50 . connector holder system 10 and the various implementations noted above holds the connector of one of the mated connector pairs , instead of the mating adapter 36 . in general , it is not desirable to precisely fix to a holder , tray , or other device both of the mating connectors and the mating adapter . tolerance offsets , and misalignments may interfere with proper fiber alignment and signal transmission . in the present implementations , the connector 12 is the primary fixation of the system 10 . if there is additional fixation provided , such as for load bearing situations , it does not interfere with the connector 12 to holder 14 fixation , or the fiber to fiber alignment . one result of providing a connector holder system 10 as described herein is that the adapters 36 can be added at a later date , when desired . in the implementations shown above , the connector 12 is protected without the need for an adapter . the above specification , examples and data provide a complete description of the manufacture and use of the composition of the invention . since many embodiments of the invention can be made without departing from the spirit and scope of the invention , the invention resides in the claims hereinafter appended . 10 connector holder system 12 first fiber optic connector 14 fiber optic connector holder 16 base 18 housing 20 pocket 22 distal end of first connector 24 rear of first connector 26 clip 28 slots 30 end of holder 32 opposite end of holder 34 shutter 36 adapter 40 longitudinal axis 42 rfid tag location 44 holes 46 posts 48 clip arms 50 second fiber optic connector 54 first cable 56 second cable 60 latch 70 mounting arrangement 100 first tray 102 structures 104 cable pass through 106 cable storage area 200 second tray 202 base 204 cover 206 slots 210 buttons 212 rear portion 300 panel 302 rows 400 mounting block 402 rows