On the picture that the one guy has of the second battery in the rear, he has a negative wire coming from the front battery to the back battery, then it splits off and the negative wire goes to the chasi, and another one goes to the amp.
My question is, what does the negative going to the amp do, and where does it go in?
Do you hook it up in the ground, and its a ground or what?!?! please help haha