I have to be honest, I don't know that I would put a toggle switch in place of the key switch. They make a simple mechanical battery on off switch you can place on the battery. I attached a picture of one I found online. Although you would still need to get under the hood, at least you wouldn't have to remove and replace the cable each time.
I'm only suggesting this because if you start cutting into the wiring harness to install a toggle, you will likely have problems when you try removing the toggle you install.
Let me know.
Wednesday, April 1st, 2020 AT 6:57 PM