I know it looks like I haven't been doing anything on the project, but that is only partly true. I have been spending quite a few hours in planning for my wiring. Admittedly, the whole process has slowed down dramatically. Finally today I determined that it is time to install the wiring I am confident in (90%) while continuing research on the 10% I still have questions about. It felt good to get back in the shop. I removed the center tuinnel for better access and pulled out the bridge which houses the main and required busses. This allowed me to start the wiring between the two of them, and ultimately to the firewall passthrough. I also installed the ground buss block on the firewall. My next step is going to be re-installing the control cables so I know exactly where they run, so as to avoid wiring in their path.
Ground block installed
Wire from firewall passthrough to main buss
Main buss linked to required buss via diode bridge