I did some more labeling, wiring, and terminating and the main alternator (Alt-1) and backup alternator (Alt-2) now have power to the switches. I also ran the starter engaged light wire from the starter contactor on the firewall to the light on the panel's vicinity, but I haven't connected it yet - one connector, two labels, wire measurement, snaking wire, etc. In running the wire, I also threaded it thru all the zip ties and lacing along the way.