What is this connector for?

NightHawk, what year is your car?

and like COramprat said, all of our cars have the same harness just some models have more or less options.. i have an 00 and i have the TC wiring harness too.. THANK GOD i DONT have TC

and im pretty sure even if you you bought the bezel and the tc controll switch you would need the tc lok in the diffrerential in the rearend for it to work...somebody might have already said all this though.. i just kinda skimmed the posts