The size of the circular plastic connectors (CPC) make them impossible to fit behind the wall panels that I bought from Aerosport products, so all the wiring connections will have to be behind the panel. Today I added nut-plates and cushion clamps to the sub panel angle to support the various wire runs. I will run all the wires back to the forward side of the sub panel for connection. On the heat duct cables cushion clamps, I added a 1/2" standoff so that they will clear the main trunk line.