8awg from the alternator to the switch
4awg from battery to switch
4awg from switch to starter
8awg from switch to accessories (stock fuse box)

It was all free to me since I had piles of it from my car audio days. has worked in this car without a single hiccup for about 6 years now. car still starts just fine even in sub-freezing weather with battery in the trunk (so power cable run is 12-15ft from battery to starter.)