Abstract: A plug-in connector (10) for a control unit (100) of a window opener in a motor vehicle, including a box-like housing (1). The plug-in connector (10) includes a plurality of motor connections (2), situated in corresponding longitudinal seats (4). Each motor connection (2) includes a base (21), partially embedded in the box-like housing (1) and a terminal, clamp portion (22), which engages with a relative comb connector (3) of the complementary female connector. A longitudinal slot (25) is made in an intermediate portion (24) of the connection (2). The areas (26a, 27a) joining longitudinal prongs (26, 27) and the base (21), and the areas (26b, 27b) joining the prongs and the clamp portion (22), deform, like hinge points of a pivot parallelogram.