Hi Raycorp,
I had a look into the Agco Parts book (free for everyone) and there we see a wiring harness to the rooftop as in the previous models connected to X633. X230 is not connected at all. On the rooftop, the steering controller (STW VD04) is connected.
Looks like this setup:
Intesting thing is there are two part numbers for the danfoss valve.
When I come home from vacation, I will test my setup on this bus.
Best regards,