Just be aware your 2 pin cut off switch doesnt have a alternator drain down or ignition cut off.
If you connect it to battery, your engine will run on when isolated, if you put the alternator lead on battery side of switch, you will likely blow up your alternator when you isolate it.
A lot dont realise that. I shocked my mate by cutting his isolator with the engine on and the look on his face when it stayed running was priceless.