Hi Pennsy Man,
I'll bet the kids are excited and you, too, when it comes alive. Great project and milestone!
I used another harness, cut in half, with one end attached to a module terminal block, the other wires connected to the power source(s) following the module wiring color specs.
Then, you can just connect the power with the harness connectors.
I also found that a little shot of WD-40 makes the harnesses easier to connect\disconnect.
What did you use or fabricate for leg brackets? Seems to be the main catch.