I have an original Automate manual in PDF format somewhere on one of my systems here at the shop.
Jim Benn sent it to me when we were designing the Automate for the P/W and Spolar machines. It may not have the wiring schematic, however.
Regarding OSHA, they could care less about the foot switch wiring in a personal situation. I was a USDOL Certified OSHA inspector many years ago for the company I worked for in Houston; Brown & Root. In fact, the first set of OSHA regulations were the actual B&R safety regulations that were adopted by the DOL.
OSHA is not going to come into your house to inspect a foot switch.
Whiz