Window opener for convertible rear window and its mounting procedure

The assembly method for the window drive of a motor vehicle involves providing a glass lifter (1) having a mask plate (7) and inserting the lower end of the lifter into a seating (2) defined between the inner and outer panels (3,4) of the vehicle bodywork. The opening defined by the seating is then closed by positioning the mask on the opening. Claims include a kit for assembling the window drive.