If you need cable to connect the batteries together be sure to use # 6 or even # 4 (smaller #, the greater capacity wire). The least expensive place is your local Welding equipment supply store. Welding cable has smaller dia. wire strands (more flexiable) it has industeral strength outer coating. The store should also have an assortment of connecting ends and will probably crimp them on for you as well as cutting the wire to custom lengths.
2005 Dodge, 2500, auto, 2wd. Pac brake PRXB. CB, Max Brake Brake Controller, Rhino Lining, Aero 60 gal. replacement tank.
1998 Hitchhiker ll, mod#31RLBGBW, RBW L'tl Rocker Hitch, Generac NP50 G generator