u/maxrated

I had this amp installed and working perfectly in my camper van until these two cables got yanked and the amp would shutdown when I turned the volume too high

I took it back to the shop and they put the cables in with the big red ones and this fixed the issue BUT now my battery keeps draining and I'm having to jump the van after it sits a few days

They didn't seem to know what these wires are doing and neither do I. I sure wish I took a picture of the initial install but I didn't.

How might I sort this out?