Fabricated a rack to mount the radios. The rack is mounted to both the center instrument panel frame and the subpanel.
The tedious bit was ensuring that the faceplates for the radios were aligned when the trays were in place. The different manuafacturers don't seem to have a standard hole location. I thought that would be standardized. No matter.
Once the trays were mounted, I started to route wires here and there. Just wanted to get an idea of what needed to go where.