I am going to install a Minn Kota Autopilot on my boat next weekend. I would like to have everything ready to go so when my fix it buddy gets here we don't have to stop and go get supplies.<br />What size wire do I need. My boat is a 21 center console and the batteries will be mounted in the console area, I figure I will need about 15-18' of wire for each side(pos/neg). I was thinking about going with 6 gauge marine grade wire. Is this ok or is it overkill???