4WD harness help
 

I'm doing an LS swap into a 1995 2door Tahoe. While removing the harness that goes to the 4wd switch, VSS and the two to the front diff, there's also a 4 prong harness that's tied into this whole harness. For the life of me I cannot find where this harness gets plugged into. On a few wiring diagrams it says it's a cross body harness but still can't find the location of where to plug it into. I've looked on the frame rail, somewhat on the firewall/trans tunnel (of what I can see or feel). I know I've should've labeled it but just thought it was an odd plug that I couldn't mess up but I did. Any info would be helpful, Thanks.