Chev HUW door switch question

[Bruce Parker (RIP)]

I think that settles it for me. I dug out a file with photocopies I made many years ago at the old Kingston Signals Museum. Here is an interior shot taken from the inside looking rear towards the back door and left door frame. The left side of the photo is the folding map table attached to the rear door, above it the sliding glass window and padlock, and to the top right the open generator cabinet. It is basically the inside of the pic I included before, the green arrow showing direction. The closeup shows the door frame with the two switch mounting holes (oddly the switch isn't all that visible), wires, and it clearly shows a metal tab...I bet spring steel...that wraps around the door frame, covering the switch plunger which it would depress when the door is closed. All held in place by those two screws on the outside. It also explains the mystery bump that shows up in the last pic.

As a side benefit the old photocopy also tells me where the exterior brown stops and the interior white begins...