Not really sure what youre talking about here. You have a wire you need to tie into the battery post? Just get a ring terminal.

Or do you mean where do all the wires go? There should be a charging wire from the alt to the fusebox/battery. Then you need a ground from the battery to the firewall, and one from the battery to the starter bolt. I also have my intake manifold grounded to the battery but thats not necessary. I think factory it just has a little strap to the firewall.