I'm all for not crossing the streams! But having different connector bodies that prevent cross mating might be an easier solution, and aren't as breakage prone as the pins are. Unless its an older Ford, all you had to do was look at a connector the wrong way and it broke lol!
Pretty damn good guess.
I would bet it was maintenance during heavy check when the panel was off.
A misplaced foot and ..... that's all she wrote.
No blame given Lower pits suck to work in. Getting a good foot/hand hold can be difficult.