Retrofit Telestart T91R to factory fitted Webasto Thermotop VEVO

Hello guys!

I have a factory fitted webasto thermotop VEVO 5kw in my 2010 Octavia 1Z5 combi.

I recently bought a retrofit kit for t91R.

What i struggle with is how to connect it. one wire for power in fusebox under stearing wheel, a ground wire, and one is to go on webasto. But where on the webasto? Anyone have done this?

The webasto is factoryfit, with options to preheat car at different set times, so it should not be nessescary to do any work on the webasto itself as it is connected to the can bus.

Anyone who can help? :) My local webasto garrage refuses to help as this is not approved because it probably isnt a " real " webasto telestart unit :P