A device for connecting component parts, such as entrainment members, to a support element of a motor vehicle door, wherein the support element has at least one protrusion therein for the positive-locking hold of the entrainment members. In one embodiment two protrusions are provided forming guide rails for entrainment members of a window pane of a cable or Bowden cable window lifter. The two protrusions are imprinted in a support plate whereby the guide rails and the support plate are preferably a one-piece structural unit of a motor vehicle door.