Every car is different, I dont know what you drive and therefore, what options you have. I ran my 1/0 under my truck. I bought some electrical> tubing conduit at Lowes called carflex, which I ran my 1/0 through for protection. It is 3/4" in diameter. I re-entered my truck in the back of the cab through a matching liguid tight fitting at the entry hole. The required hole needs to be 1". I used a 3/4" bit and rasp to make the hole. I used heavey duty zip ties to secure it under the bottom. If I find something better than the HD zips, then I will go that route. But, you may find a way to run it inside.Can I run 1/0 under the carpet?
x2Well anyways its just a ford exploder if you blow it up installing everything it wont be a loss.