@Robo_Eng_13 I could see value in making a bundled cable that splits out to 10 motor contact points, each clearly labeled, then mounting that cable to a simple frame which may include quick and easy to change motor mounts. It would be easy to bolt down a cortex, plug in the cable bundle, then test each port independently very easily by plugging into the labeled extensions rather than the cortex itself. This could also be set up to test a variety of sensors in a uniform way.
I agree there's value in that kind of plug arrangement. It's the sort of thing I do when building devices outside of VEX. I found some gang plugs that fit each of the port plugins, and thought about doing it specifically for easy swap out in testing.
As to using it in competition, however, I remember there was a Q&A asking whether such a gang plug would be competition legal, and the answer was "no."
In a quick look I haven't found the Q&A. But it's not a VEX supplied wire, so we don't really need an official ruling. Still somewhat useful, (mostly by shops with lots of Cortex units) just not in competition.