wiring removal

i searched and couldn’t find anything, if i missed something i’m sorry

I’m trying to take the wiring harness out of my car (s13) so I can send it away to get spliced into an rb25 wiring harness. now I know I need the lower harness and the upper harness. I think I have the lower wiring harness out, (if it’s the one that connects to the fuse box on the passenger side and connects to the battery)

my main concern is getting the upper harness out. I have it all connected from the inside of the car(engine is out) and disconnected from the computer on the inside and I followed it under the abs to see where it goes through the fire wall, but can’t find it on the inside where it goes through. I took the glove box out and still no luck and I don’t wanna pull on it cause then i’m just looking for trouble.

what i’m wondering is how the hell do i get the damn thing out, ive played with it for a while the last 2 days but I have a short attention span and get easily frustrated and just want it out now. and can someone confirm if I did take out the lower harness?

got it out and answers to my questions