I just ran across your post looking to answer some factory servo drive wiring questions. I have a Bridgeport R2E3 BOSS 8 that I am upgrading with a Camsoft Professional package. I have a set of factory wiring schematics but am unable to identify the servo drive motion command signal wires and the servo drive enable wires. I do believe the signal comes from a processing board (FMDC, DLI, ect.) but ??? I imagine that if you used the existing servo motors you have identified these wires. Any advice would probably help.