Removed the trunk plastics. Pulled some 1/0, 2/0, MS3Pro wiring and drilled the shut off. Had to order some Grommets so I don't slash the cables in half and managed to find OEM spec.
The shut off is in the car but I forgot to get a picture, it looks really cool. I need to get some pop rivets in the beauty plate yet so I'll grab photos then.
If the wire seems pretty heavy duty... it is. I will not need to worry about too much draw through any of the cables.