I have an optima yellow top in the front and an xs d3400 in the rear. Going to be putting a crescendo bc3500 on the xs battery. Just was wondering if its alright to only run one run of 0 gauge from battery to battery? One from positive and one for negative. I have been told to run 2 runs from battery to battery but whats the difference? If i only run one will it hurt? Thanks for the help guys!