the attachment plate 1 shown in fig1 comprises a rectangular and planar front wall 2 and side walls 5 and 6 bent towards the rear at 90 °. for mounting the attachment plate 1 on a supporting frame 10 shown here only partially , the plate has recesses 4a and 4b in the front face 2 and in the side walls 5 and 6 . latch 15 , which is only barely shown , may be introduced through the recesses . the latch connects detachably the attachment plate 1 with the supporting frame 10 whereby it engages with a head , not shown here , dovetail grooves 11 as well as channels 12 . as a rule , the attachment plate 1 is connected with several latches 15 of the same type on opposite sides with the frame 10 . for positioning the attachment plate 1 on the frame 10 the side walls 5 and 6 comprise projecting lugs 7 . in the same manner the attachment plate 1 may also be mounted on frame 10 rotated by 90 ° so that the side walls 6 also are in contact with the support of the frame 10 . the front wall 2 comprises two groups 3 of three mounting sites each in the form of breakthroughs 3a , 3b , and 3c . the two groups 3 are disposed symmetrically in mirror image with respect to a line s . the breakthroughs 3a and 3c are preferably circular and have a diameter of 30 to 36 mm , preferably 33 mm . the centers of breakthroughs 3b and 3c are disposed on a straight line a which is parallel to a lower edge 13 . it is clear especially in fig1 that in each group 3 the breakthrough 3a is disposed above the two breakthroughs 3b and 3c . however , the distance between the two breakthroughs 3a is different from the distance between the two breakthroughs 3c and also different from the distance between the two breakthroughs 3b . furthermore , the distance between the two breakthroughs 3a is different from the average of the distances between breakthroughs 3c or 3b , respectively . the corresponding distances are denoted in fig2 with x , y , and z . the distance between line a and line b through the centers of breakthroughs 3a is designated by w . for the greatest possible applicability of the attachment plate 1 these distances as well as the diameter of the breakthroughs 3a to 3c are essential and are given in the following table . deviations from the above distances are possible but lead , as a rule , to an opening which is less than the optimum . deviations of the diameter of the breakthroughs 3a to 3c as well as deviations from the circular shape of these breakthroughs are also conceivable . conceivable is also an implementation in which the front face 2 comprises more than 6 breakthroughs for lead - throughs . an attachment plate with a seventh mounting site on the line of symmetry s would also be suitable for an additional central mounting of a fixture . the front face 2 is preferably rectangular and has a length l of 248 mm and a height h of 120 mm . the depth of the side walls 5 and 6 is designated by t in fig2 and is preferably 32 mm . for an especially optimal implementation of the fixture plate 1 these dimensions are also essential but it is understood that slight deviations are possible . the dimension t corresponds preferable to the profile width . in fig2 to 5 are shown some typical examples of the applications of attachment plate 1 according to the invention . in the arrangement according to fig2 an isolating valve 15 is mounted on the attachment plate 1 . the breakthrough 3c used for the mounting is covered by a rosette 16 . clearly a second isolating valve 15 or another fitting may be mounted on the attachment plate 1 . fig3 shows an attachment plate 1 on which is mounted a safety group 17 . the latter has two conduits 18 and 19 which go through the two breakthroughs 3a and are mounted on them . also in this case the breakthroughs are covered by rosettes 16 . fig4 shows an attachment plate 1 on which are mounted washstand fittings with a siphon trap 22 and a valve 20 . in the case of this attachment plate a breakthrough 3a is used as well as a breakthrough 3b . through the breakthrough 3b a screw neck 21 of the siphon trap 22 is guided from the rear . fig5 shows an attachment plate 1 on which is mounted a so - called mixed - water fixture 23 . the latter comprises an actuation lever 33 as well as a spout 34 . lines 24 and 28 for warm or cold water , respectively ., lead through breakthroughs 3b . here also is provided in each instance a covering with a rosette 16 . if the distance between the two lines 24 and 28 is shorter , breakthroughs 3c or 3a are used correspondingly . however , the use of a breakthrough 3b and a breakthrough 3c is also possible . the mounting battery 23 on the plate 1 is shown in fig6 . pipe 24 comprises an outer flange 31 which rests on the rear side of the front wall 2 . on the opposite side of the front wall 2 is applied a counternut 32 which is screwed onto the outer threads 55 . between the flange 31 and the counternut 32 is placed in the breakthrough 3a a packing ring 30 made of a sound - absorbing material , for example rubber . finally , a rosette 16 mentioned hereinabove is placed onto the line 24 . the dimensions of the ring 30 depend on the outer diameter of line 24 . in the case of a small outer diameter , a ring 30 with a smaller inner diameter is selected accordingly . lateral displacement of line 24 is prevented in every case . consequently lines 24 with different outer diameter may readily be mounted on the attachment plate 1 . lugs 53 on the rear side of the front wall 2 which engage corresponding recesses 54 of the flange 31 facilitate the aligning of the fixture during the mounting operation . a suitable arrangement of these lugs 53 is shown in fig1 . in fig2 these lugs 53 are not shown for reasons of clarity . fig7 shows an attachment plate la in which each mounting site comprises eight bores 35 which are disposed in a circle 37 . as shown schematically in fig9 this plate serves for mounting fixtures 39 which comprise an outer flange 42 . the latter may be mounted by means of tapping screws 41 which are screwed into bores 35 . the lines 40 leading to the fixture 39 in this case do not pass through the attachment plate 1a and the corresponding breakthroughs may here be omitted . in addition to the bores 35 , breakthroughs 3a to 3c are provided in the implementation according to fig8 . in this case the mounting shown in fig1 of a line piece 43 provided with a flange 45 is possible . the fitting is here screwed onto external threads 44 of the line piece 43 . here are self - tapping screws 41 screwed into corresponding bores 35 of the attachment plate 1b . accordingly , a mounting site comprises in attachment plate 1b in each instance a breakthrough as well as several bores 35 disposed around it . finally is shown in fig1 an attachment plate which also comprises two groups each with three mounting sites . however , here two mounting sites or breakthroughs 3a and 3b are disposed on a straight line k extending obliquely and a third mounting site 3c is offset with respect to the former . the above stated distances x , y , and z , however , are also maintained in this implementation . in contrast with the other implementations described hereinabove , here a greater height h of the plate must be provided . the openings and latches , explained in connection with fig1 and 2 , for mounting the attachment plate on a supporting frame 10 are also provided in the case of the attachment plates 1a to 1c . however , they are not shown in the corresponding figures .