So, starting with the main power wire from the alternator to the battery, I came across some free 4/0ga wire. Kinda way overkill for a non-big stereo vehicle, but, did I mention it was free. Remember this can be in addition to the stock wiring. So it's a nice short run from the alternator to the battery. Here's a shot with it fitted, but I still need to put some new heat shrink on the ends, and some split loom. Also going to be tying it down close to both ends. It has to have flex in it since it's mounted to the motor.