Barnone, thank you you have gone to allot of trouble, to answer.
Behind the black box, you found two green (right side?) & one red (left) I need to find that red lead ( I haven't cut the holding ties yet)
Will open both & look.

Regarding Blue/white & yellow (my picture) with no wire connected other end, what was yours connected to?
Wait look at your first photo, same as mine (just above the tie rod) it's the same, dead ends, other end heat wrapped & no further wiring, right?
I have not disassembled Illuminating switch other than screws to open for new bars. Tempted due to diagram showing allot of related wires to my issue. I've been concentrating on left Dimmer.