I have 2004 2wd Chevy Silverado tried 4.8 motor. Underneath my fuse panel In center is square plug in approx 2"x3", that's ok, I have 2 other plugs from stock harness white (10 pins)w/purple tape wrapped before plug and other plug is black (12 pins) w/ green tape wrap. Seems I am missing connectors to plug my 2 connectors into that go under my into my fuse panel? Pic or any info to get me out of the gate here would be great, thx again!