You're fine just putting that on the battery all your pulling is a 12v source from the battery anyways that's perfectly fine for the positive, you should be fine as all your connections are tight.
Is there a way bypass to the factory wiring and still have your lights come on with either your headlights or parking lights? Or do you need to a switch somewhere and manually need to control them?It's ok... I believe that is correct, I just never mess with any factory wiring I always do my own seperate wires.. You want them to come on automatically for covenience I'm guessing..