For what it's worth....
Ours is the similar...
In the fwd cabin stbd fwd alcove, there are 3 cct breakers...Bom, Mat and Foc/Gunideau ...so the genoa and the windlass are on the same breaker.,....
We are SM437 from 2004, so clearly this concept wasn't changed..although the wiring and connections were certainly improved...
I wonder if an easy solution to isolating the windlass could be to have a switch in the windlass control cct to disable it.
I'll think about that.
Thanks Bill for pointing us in the right direction.
Cheers
Alan
SM437