The only panel on my machine that needs to come off is the flat panel under the steering wheel up under which the module was bolted in. And yes Fred, the red wire is extraneous in this application. You can just leave it taped or capped with heat shrink.
On that note, I finally received my correct order and got the other controllers I ordered. I made up a small extension harness tonight and tested the controllers, everything is working perfectly via shuttle switch. I used the same color wires on my harness that the original harness uses. I'll include a photo of the wired connections. I just ran a jumper across from "Power -" on one controller and connected it to the same terminal on the other with a black wire. On the overload setting I set it at 3.0 amps, and I think I'm settled on a 3.0 second soft start. I left the under-voltage protection setting at 10.0 V. I left my displays set for amperage so I can monitor the current the solenoid coils are pulling.:
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