Started Installing Battery and Starter Contactors

Since I positioned the contactors far enough apart vertically that the mounting ears didn’t interfere (which is not according to plans), I couldn’t use the stock positioning.  Instead, I simply adjusted the pair vertically until the outboard ears intersected with the firewall stiffener centerlines and marked the holes.  I then drilled and installed L1000-4 nutplates on these holes.

Here’s the cabin side.  I had to countersink the firewall and stiffener for the AD3 rivets that attached the nutplates.  I’ll drill the center holes later.