Grounding question

[fwuffy squirrel]

Okay so I read up on grounding kits and ever found most of the answers I needed, but I always seem to mess something up really badly and would like some idiot proof advice.

I have my battery relocated to the back and I just purchased an NRG ground kit (I know you could make your own, but I got it for a good price). Anyway I have all the cables and it feels like a shame to waste the circular part that is supposed to connect to the negative terminal.

This is a diagram I found.





Is there any way I could use the circular part on my negative terminal without having to make super long wires?

And do I even need to use the terminal? Could I just use the basic grounding point that exists where the battery used to be?

Lastly, would connecting the wires to the main engine points then all to the firewall for a ground work without giving me ground loop problems? If not, should I just find different grounds for each connection?

Thanks for all the help guys.