I want to put a second battery in my truck cuz of all the dimming...i did the big 3 and it helped with the voltage but dimming is still an issue..i upgraded my alt from the stock 160 amp to a 200 amp that i bought off a guy with a diesel sierra 3500...the problem is that i dont know how to set it up...i have about 25 feet of 0 gauge left fom my big 3 setup...oh yeah i have a 08 yukon and im running about 2500-3000 watts...also mu truck has a second spot to put a battery...