It’s the two on the right side. Edit: Interestingly, these are also not wire twisted. I wonder if that contributed to the problem. Hopefully someone more knowl

It’s the two on the right side. Edit: Interestingly, these are also not wire twisted. I wonder if that contributed to the problem. Hopefully someone more knowledgeable can chime in on that. I thought all threaded fasteners needed to have safety wire twists on airplanes.