modular jack 20 39 therein a pair of base mounting means 132 and 134 are incorporated into the rear surface 135 of plate 131 bases 132 and 134 are of the same type and each is similar to base 10 described hereinbefore so that common elements are again denoted by prime numbers base 132 comprises sides 136 138 ends 140 142 and a portion of surface 136 which form a channel 22 39 ends 140 142 have an inverted u shape and together with surface 135 define an aperture at each end sides 136 138 extend normally from surface 135 and comprise three protruding elements 50 39 and a tab 52 39 extending upwardly at each end strip 14 39 of assembly 12 39 is secured in base 132 in the same manner described hereinbefore mounting bases 132 and 134 are located on surface 135 in a side by side configuration with each mounting base being positioned directly above a corresponding opening 144 146 assembly 12 39 described hereinbefore is shown with mounting strip 14 39 connected to base 134 and with modular jack 20 39 secured in opening 146 by a second type panel yoke 148 having a sliding door 150 panel yoke 148 may be of the type described in aforementioned u s ser no 566 126 plate 131 further includes.