If anyone is considering relocating their washer bottle on a GVR4, It's pretty easy. I was able to use the stock bottle, with an L bracket from the washer fluid bottle off my DSM. When I had the wire harness out for fixing, I pulled the two wires for the washer fluid motor through the grommit and then ran it behind the dash, through the dr. side fender, and out the grommit behind the dr. side motor mount. Just have to run new hose (which I had to anyway, old stuff was junk).
Looks way better in this location than where it is on the firewall from the factory.