All of the little parts I made the other day are installed onto the mounting channel (pic 1).
There were some tedious alignments for this subsystem, so it took longer than I expected it too. Assemble, mark, drill, reassemble, et cetera. But it's installed and I'm happy with the result. Tested the operation with the battery in pic 2.
Next, I'll install the aft brace and the side covers. I also will install the wiring conduit and ground.