On a closer look it appears.....that I can cut out the fuse on the + side because the power side will be fused at the fuze block.
The - can go back to the fuze block.
The 17 feet of red and white wire that would go to the switch can be cut to leave two wires a second ground and the other that needs to go to a switched source. My GPS power source is also wired in nearby. I guess I could pull the switched source from there since draw to activate relay is minimal??