Where can you find a wiring diagram for the electric roof system on a Golf Mk1 cabriolett?

You can find the complete wiring diagram for the Power convertible top Mk1 Golf cabriolet in a Volkswagen Service Manual called "Volkswagen,Cabriolet & Scirocco" 1985-1993 by Robert Bently. There are drawings & illustrations on how to service the bi-directional electric motor and pump unit.