Webasto Thermo Top V: Pinout & Wiring Diagram

Hello,

As the title suggests, I'm looking for the pinout diagram for a Thermo Top V, which likely came from a Golf IV, possibly a Golf V. The adapter cables connected to it have VAG part numbers starting with 1J0... (I'd need to look up the exact numbers at home).
Ideally, all information related to this specific topic would be interesting.

If anyone can help me, I would be very grateful!

Matthias.