Just to give an idea of where the wiring panel is actually going.

I first mounted a 1×4 to the wall studs underneath the helix, then screwed in some 1/4″ screws into that. The panel then simply hangs on those two screws. It actually touches the floor, so the mounting screws primarily just keep it attached to the wall without having to support all the weight.

The space to the right of the panel will be where Panel #2 goes eventually. This one will house SIGM20 boards for Signal Operations, and a CTI Sentry board or two for photocell sensors (these will be used for automatic train operations)