Well, I am working on the battey relocation kit myself, I will see what it will take, I may have to use the 1/0 gauge, I think 4ga may be too small. Speaker wire depends on the gauge. I have some really cool 12ga, its twisted (seriously) silver and blue for rejecting noise. I also have the regular stuff in 10,12, and 16ga. Let me know what gauge and I'll get a quote to ya.
