Where is a good ground in a 91 integra?

Question

I got the amp hooked up it works now but the only ground I can find is the bolt that holds the seat down I noticed it doesnt work on any painted surfaces are there any other available grounds in the trunk? and why dont my terminal connectors work on my ground wire only the wire itself is turing the amp on

Answer 1

The best ground is one you make yourself. grind off some of the paint the size of the ring and put some conductive compound on it before you s***w it in to prevent rust