On the left side of the reel mechanism there is a small bundle of wires that comes forward.
Possibly cut and tucked back and tape or tied together. If this is the case, these would be the meter signal wires.
From my recollection there is.
Three wires to operate the switches, could be a white/yellow, brown/white and orange.
The meters themselves have two short leads that are the same color.
If everything is in working order it wouldn’t matter which meter the wires were hooked to.
I’ll look for a schematic tomorrow and post a photo of the section containing the information.