New Guy

Saying hello from the Prescott Arizona area. Picked up a nice 2007 King Cab Frontier about a month ago. Liking it a lot.
Writing today because I am having some problems with putting in a back up camera and a new double din radio. Crutchfield put a reverse and parking brake interface on the radio for me, but instructions are to hook the reverse interface wire with pin #33 on the big black 48 pin wire harness behind the passenger side kick pad. They provide the color and a photo, but it wasn't specific enough. Any ideas on where to find pin location #33 (light blue wire) on that specific harness block. The also provided a parking brake interface on the back of the radio to connect to the parking brake wire, but again, with out any specific diagrams, hard to locate. I have a hand break on the console between the seats.