I definitely had it connected in parallel as, I could see it visually and voltages remain consistent across the parallel and the individual batteries (out of parallel connection) at about 13v. I think that I did not tighten the leads enough. I did that this morning and all went well. Thanks...
I'm not sure if this is the best thread for this, but I am hooking 2 12volt 160ah batteries in parallel and used a switch to starter battery cable I found at auto zone. It is 4 GA and 19" long. Is this substantial enough? My concern is that when I hooked a battery charger to the setup after...