I currently have a Marquette model 501 removed from our barn that works but I don't have any instructions as to the plug positions. They are as follows:
0 0 0 0 0
0 0
0 0 0

Through a series of combinations there will be a different amp configuration. Unfortunately, all the markings have rusted. The plackard shows a max of 180 Amps. If anyone knows the configuration sequence please respond to : jtomlucas@earthlink.net Thank You