https://www.amazon.com/gp/aw/d/B01IV...b_b_asin_image
The battery cutout I bought is above. You don't have to use it wireless, any switch will take the place of the wireless unit.
I also have the remote terminals you installed. Neither are installed yet.
I might go ahead and move my chassis battery into the space behind the passenger headlight.
No reason except I'm about to replace it, it'll be out, and a set of longer cables and a frame mounted box will forever cure the location problem.