I think I understand why none of the lights or controls in the Travelall work.
That hole there? The one in front of all the cut green wires? That’s where the fuseblock is supposed to be. Some baboon decided to just cut the wires instead of disconnecting them—the back of the fuseblock is organized with brass male posts to clip the wires onto. So I’ve got to source a new fuseblock panel from somewhere.