I used the left metal tab for the under dash plastic hold down piece. Metal screw goes in there.
I used a 10 gauge wire to a terminal strip so each added wire has a screw to go to.
Well I did that on the GN. wink
On salvageV6 theres about 20 ring or spade terminals on that one mounting screw under the plastic piece.
Firewall is a good idea for s ground point. yup