I also started to mount all the firewall items related to powering up the plane. The first two pictures are the stock setup for battery and master/starter contactors. The last picture is the additional contractors I need for cross feed and external power.
The third picture shows a pencil take off I did of the doubler plate in picture two before the hardware was added. I used the take off to make a duplicate plate that holds my additional contractors to the firewall. I used this technique when I made the fuse panel shown earlier.
