S5 na misc wiring
 

Hello, I recently rebuilt my s5 na motor and I didn't make descriptive enough labels on some wiring and now I'm confused. I checked the fsm wiring diagram and got the yellow/red stripe wires figured out as a missing oil condenser/filter wire. But I have a female black w/red stripe wire next to the oil pan sensor that I can't find any plug for except this equally uselessly labeled wire that is male that says tranny ground.

I can't find info for these in the fsm, do any of y'all know what they could be? Thanks
https://cimg7.ibsrv.net/gimg/www.rx7...3aa389882e.jpg
https://cimg0.ibsrv.net/gimg/www.rx7...75762b2ced.jpg
Black/red

I think the trans ground wire is meant to ground out the black/red wire which is supposed to be the sub zero sensor. Not sure tho