I came across a door crasher at a big box office store for the heavy duty Nascar branded jumper cables, I clipped the alligators off and soldered the marine battery connectors. It is 2 gauge. It may not be marine rate, but is working very well still. Cost about $40 all in all, and gave me two sets of 6' batt cables. If your able to move the batteries it would save you major coin.