Stripped Bolt for Braided Ground Strap

I was just in the middle of changing my braided ground strap on my 99 4.0 and in a rush, used my gorilla hands and twisted the bolt on the firewall and it will not come out. What is holding that bolt into the fire wall, is there a nut on the inside, or is the firewall threaded? I bent some of the thin sheetmetal where the bolt goes into as well. If it is threaded its most likely ruined, could I move The bolt a little further down on the firewall? Any suggestions? Thanks in advance.

Pull your cowl off, there is a nut behind there.

Im going to be doing this today probably lol.

Im using 1 awg hoss arse welding cable I had laying around to make the ground cable lol.

Thank-you, I was assuming there was, I just in a rush, and getting annoyed and you know how that goes. Im going to retry this tomorrow, and trace a short in my cowl mounted lights as well. Thanks again