Well its not the sound system I'm worried about, its the winch. What the heck, I ordered 12 ft of 1/0 Knukoncepts black KCA cable, 10 ring terminals, and two top post battery terminals with wing nuts on studs. No more worrying about overtightening my side-post battery haha.
In addition to the battery to alternator, neg battery to block, and block to frame I'm also going to do the cab to frame. I'm going to get the side post terminal out of the stock battery cable and continue to use it for my cab lights, radio, and small amp/sub, and leave the top post for the big wires, winch, and KC lights.