Remove two rivets from the firewall that correspond to the battery box and enlarge the holes (3) to #12. The third hole was open since the F-601K-1 firewall recess is not yet riveted on. I will try to do this as late as I can, since it gives acdcess to working behind the wirewall.Test fit the battery Box to the firewall to make sure the AN3-4A bolt line up with the enlarged holes. All is OK.
