Alright looks like I'll be upgrading to 0AWG for my power wire..
Another question..
Since I upgrade the power wire to 0awg, should I upgrade the ground on the battery to 0AWG too? If I do, do I replace the ground wire on it right now? or do I run a different ground wire from the side terminal of the battery on the yellow-top, since I'm running the power wire from the side terminal already.