An installers best friend for a quick on and off function to just about every accessory you install. This switch is custom made for us to be able to handle a full load of our fusebox so your able to cut off power to the entire fusebox if needed. Use it inline on any circuit to be able to cut power on and off when needed. Especially important for accessory that has parasitic draw over time so it will not drain your battery.
Surface mounted on any panel, simply drill a small hole for the threaded head to go through and screw in the waterproof rubber cap. Couldn't be any easier for installation.
Install on the negative ground side any circuit is your best method.