That switch looks like it would probably reverse polarity to a pair of wires connected to the centre contacts, with positive and ground connected to the end pair.
Looking at the wiring diagrams all the Europas with electric windows had three wire motors. Earth and an input for up and an input for down where +12V would be applied. Has the motor been changed?
To use that switch with a standard motor I would expect to connect live to one of the centre contacts and the up/down signals to the pair at the end.
Edit: Forgot to say. Make sure you check the switch operation is as expected with a multimeter, or bulb and power source, prior to wiring into the car, or you may release all the smoke from the motor and wiring, and need to replace it......