I missed this one so I am going back to it.
Here is the ground stud that I will be using on the passenger side of the car. It goes directly to the battery and it will be also be a brass bolt.
Firewall fitting test fitted it one last time before I permatex it to the firewall.
Way back somewhere in this thread I put the part number for the machine washers that I am using on the inside of the firewall.
All glued in and nice and tight.