Thank you brad for helping OP. I may add that the original cable for 780 is Dell FH439 780 part the original media card readers for 780 are Flash Storage Device, UNIVERSAL SERIAL BUS, READER, ENHANCED, MATRIX CYPHER SMALL FORM FACTOR, IOI Dell 8RYX9 Flash Storage Device, UNIVERSAL SERIAL BUS, READER, ENHANCED, MATRIX CYPHER SMALL FORM FACTOR, TEAC Dell TW036
Hello. I want to upgrade my good old Optiplex 780 Desktop form factor, by adding an internal media card reader. I found a used one (ref OW812M) and it fits inside, but I dont have the cable. I do not know what is the official reference of the cable . I dont want to buy a cable that may be to short for the central unit. I have found several references (FH439, GH439, XN068, NT424) but I was wondering if there is an universal cable  compatible ("flex bay" cable). So, what may be the cable reference to connect a OW812M card media reader into an Optiplex 780 Desktop ?   Thank you !
OptiPlex 780 : cable for the internal card reader