Okay... The only thing I have to go on is U25. The first pic is of AIM U25, View A, B, & C are highlighted. Pics 2, 3, & 4 reference each one. If you'll notice, there should be a wire coming out of each of the two connectors leading to the Lamp ASM, Obviously they aren't. These wires' could have been yanked, or perhaps never existed.
I'm leaning towards what Ron mentioned, here's why. I remember having a conversation with a guy who worked on the final details of the restoration. He mentioned that he had a horrible time with the fiber optic wiring. To this day there are issues. If what Ron is saying is true, and the FO wiring is part of the ZJ9 ASM then the riddle is solved... I think...
Pics B & C should be switchedAny Fiber Optic experts out there...