can a SE dash harness swap into a Gtu dash. it looks to me like it can except for 1 red and black wire that goes back through the firewall it seems on the right side. its righ t next to the big blue connector. there was no wire like that on the se. any idea what it is. can i cut it or what.

 

the wires are red and black and red and green

 

also. i forgot what plugs into the very right big yellow connector. i cant find anything that that would plug into. please help. im doing this right now