above the worm gear 15 within the circled region 17 the electronic power system 16 is attached electrically by welding here to connecting contacts of the electric motor 12 the connecting contacts being fixed to the holding part which is configured as a plastic skeleton by being plugged in fig3 shows a perspective view from outside of a section of the second shell part 4 which section is assigned to the gearbox 14 a through opening 18 can be seen which in the finally mounted state is penetrated by an output shaft not shown which is driven by the motor gearbox unit 1 three stud bolts 19 for connecting the motor gearbox unit 1 to the pane wiper assembly are provided distributed uniformly around the through opening 18 in the circumferential direction fig4 shows a perspective view from inside of the second shell part 4 in an intermediate stage during production a region which is assigned to the gearbox 14 can be seen in the plane of the drawing at the top and a region which is assigned to the pole casing 9 can be seen in the plane of the drawing at the bottom furthermore fig4 shows a part spherical inner face section 20 which is situated in a region between the region which is assigned to the.