My uncle has a weldan power 225 Ac 225/5AS code #5761 we need your help please to find out how the color wiring goes on the rectifier I think that's what its called a plate where the wiring is connected there's five colors black, red, yellow, brown, and green wires the plate has 4. Thanks for your help

My uncle has a weldan power 225 Ac 225/5AS code #5761 we need your help please to find out how the color wiring goes on the rectifier I think that's what its called a plate where the wiring is connected there's five colors black, red, yellow, brown, and green wires the plate has 4. Thanks for your help