If using same quick disconect link I'm using remember you won't find diff gauge wires for red and black, so you will have to stuck with 8 or 10 gauge on both sides. You can still use the 8 gauge wire and splice in it a 10 gauge running to batt and of course the 14 fuse link.

That's JUST an idea about this, being clean, but there are a dozen of ways to make this. You can even install junction points to get power from there anytime you want. I.E. on black side at firewall to get power there from the correct side of the ammeter for a correct reading and feed accesories. This could replace the quick disconect link and the splice for the quick disconect link loop. I'm using quick disconect link because I don't want to drill my firewall or anything on engine bay to install junction points



You can even use a dual side stud installed on firewall and not use a grommet. Something like this:




Althought I like these better ( but is bigger than needed )