2/0 welding cable is great on 6v systems, its very fine strands and bends very very easy, soldering the ends on is best, use rosen core solder and coat the outside of the wire with rosen flux (do not use acid will eat the wire),clamp the end in a vise pocket up, and heat till the solder melts inside, then fill 2/3 of the way, then insert the wire into the pocket slowly allowing the solder to wick up the wire. When the wire bottoms out remove heat and let cool. cover the connector to the wire with head shrink tubing.
