Here is a schematic as to where to wire in the BAP:
You take the left side liner out of the trunk.
You cut the wire just under the inertial fuel pump cutoff switch in the trunk, and wire the BAP power into the circuit there. Scrape some paint off a non exposed body panel and ground it using a self tapping sheet metal screw. I just shorted the Hobbes switch input wires together to turn it on all the time, and set it to 5 since we have a returnless fuel system, and ran that way for years with no trouble.