Popping the "turn signal mounted incorrectly" bubble:
Depending on your car, the way he has his turn signal lens is correct! I have factory photos of preproduction & early production cars with the lens that way - I have sales brochures with the lens that way
I've not jumped into that discussion because I didn't want to embarress the guy who started that tale...but, early on during the design & initial run, they were correct...about the time they started putting amber lense on the 2-piece lens, they started turning them around.
If its a 2-piece clear lens, either way is possibly correct - according to factory photo literature.