i wonder which would be best for my system..
A. Wire Parallel Primary Battery(engine bay not a car audio batt just a regular car battery) to 1 Secondary Battery(xs D3400)and Gauge 0 and Gauge 4 ALTERNATOR to second battery
B. or Just put Gauge 0 and Gauge 4 FROM ALTERNATOR Going Straight to the second battery(Xs D3400)and leave the primary battery alone