I think that is a 12V
plug that was from the battery in the front box. Since I am doing a complete rewire I didn't note what sent where, just cut them out. There's no sign the dc's been used in decades. A butcher job of installing an AC panel in the rear area was at least 20 years old.
On step at a time. Flexible plan without heading too far in one direction without keeping the related steps moving along. It's like a house. Step one, get the foundation and roof squared away before you repaint the livingroom or refloor the bedroom. Except the scale is alot more managible than a house. And don't let it fall down in the process. Right now the shell is held in place by the steel plate in front and four (?) ribs that actually rest on the floor. Frankly iI think the floor's design is more to hold the shell down while moving then to hold it up, except in a few places. The shell is so rigid by design that as long as it's intact I think it supports itself on those few "legs".