I am installing a new head unit in my 2000 tl right now and i have a couple of questions. On the stock unit there is a place to plug in the harness and right next to it another plug goes in, but on the new unti there is not place for it. do i leave it idol? Also i test the headunit in the car, and all the speakers work except for the front left (i checked the harness and redid it), could i have blown a fuse?

thankss