hey Bob - I took a pic of my 57
that shows it reasonably correct - the main harness is original factory and feeds to the regulator, down below to the rear, brakes and gas tank, and also to the generator and lights - where the vacuum wiper tube would be is a tube to wipers from a washer I installed, and if you've got the throttle cable, it'd come out there too, with the choke - wire to coil can be there or in the one over by the battery - enuff info?
Bill
