To continue with the firewall progress, next I made the wires from the shunts to the Primary and Backup alternators. I made the wire that will carry the alternator power back thru the shunts and ANLs and will send power back thru the system to charge the battery—good progress in completing the wiring loop from the battery to the alternators. I also worked on tidying up firewall wiring. I had intentionally left the wires long until I got to this stage and had the firewall layout completed, so now is the time to shorten those wires going to the starter contactor. I started with the #2 battery cable and shortened that monster, inch by inch, until I snuck up on the optimal length. I sure didn't want to over-cut that one! From there, I moved to the other wires shortening and tidying.