i was lazy and ran mine through the fender, then from there, there are wires comming in through the door to the power locks/windows, i cut a hole in that and went in there, ran it under the steering wheel, and down the center console. Idk if its gonna work on a 4ga. wire however, considering mine was 8ga. and was much smaller. 4ga. might get caught in the door in the location i put mine.

Stuff: Xbox, 7inch tft screen, 2 12inch infinity 1242w's, poweracoustic amp,pioneer HU, Tokico HP struts/springs, buddy club p1 perforance II plus 17inch wheels