Perihelion Design sells CCA-2 (copper clad aluminum AKA fatwire) wire which is half the weight of the equivalent 2 gauge copper wire. Although lighter, it has a larger diameter which means running this wire is a bit challenging. I have designed a brackets etc that make running this wire simple.
The first pix so the general wire run, the second the passthrough that protects the wire when crossing through a rear seat rib. The third shows the wire passing through the lightening hole. Note that the extra “tube” is for additional wires that will run parallel to the fatwire. I will also use a similar passthrough on the final lightening hole as the wire exits into the tail cone. The last pix shows the bracket used to secure the fatwire to the side of a rib.