so that pivoting of the angular region 71 around the pivot axis 69 releases the ribbon cable release of locking between the ribbon cable and the locking region 71 can also occur by moving the upper edge 101 of the locking spring 35 in the direction of arrow 34 b 34 depicted in fig8 so far from the ribbon cable that the locking region 71 disengages from the ribbon cable the ribbon cable can then be easily removed from the cable plug in opening 29 and the cable plug through opening 31 views similar to fig8 are shown in fig1 and 11 in the embodiments depicted in fig1 and 11 the insulation material 15 is not cut on the lower ribbon cable end where the flat conductors 13 are exposed but instead is turned upward in the form of a wrapping 121 and acts there as a support on the inside of a front wall 123 of additional housing 33 the wrapping 121 supports reliable positioning of the ribbon cable for reliable engagement between the locking region 71 and the locking recess 59 63 or 65 and optionally the upper reinforcement sheet end 115 fig1 shows an embodiment in which the arrangement of plug in connector 21 additional housing.