This tread shows the wiring for the Magneto disk motor on an XMLE. gandalf37j is making a mod to add this motor for the standard XMen and needed some photos and layout of the components that control the disk motor. I think I've traced all the circuits and found all the schematics for how this works (not very detailed in the manual).
Basics of the circuit:
The motor runs off of 24VAC. The two sides of the circuit are J10-1 on the power driver board and from the transformer
A relay (part number 511-5259-01) controls the power to the motor. The relay is driven by J7-1 and J7-9 on the power driver board.