I'm hoping to see if anyone can help on this old machine. I got a Sun Dist machine in a dismantled state and have been reassembling it. Everything appears to be there and function mechanically the way it should, The wiring was a bit more difficult. I have managed to solder, repair and route the way it goes I think except for a large red wire that I first thought was a ground to the chassis. It originates at the transformer thru a I think a large Diode?. If anyone can I.D it thru the photos or Have A diagram or clear schematic that would help.

