I pulled the upper door panel off and was looking for a place to mount my mercury switch. There is one flat panel that looks like the correct angle but I have to make a new switch with the switch mounted so the terminals are not on the tilting end.

My drivers door latches real easy on the front latch but not the rear latch. So even if I took off the rubber cap so it would indicate the front latch is not closed, you would still need a rear door switch to sense that latch.