I suspect that this question is meant for me, even though it's a general forum and doesn't specify who you're asking anywhere.
The "twist lock" feature you're talking about, is from this page, right?
LED star adapterIt's not a twist lock, it's just a way for the 3d-printed key to get the adapter out of the hilt.
The adapter is probably not what you want. neopixel-based blades are much cooler, and described on different pages.
The blade connector shown on that page, is only the insert from the aviation connector, there isn't enough room in
the star adapter to fit the casing.
What you probably want is to check out one of these instructions instead:
PL9823 bladeLED strip bladeI also highly recommend buying a
TeensySaber V2 instead of building the V1 electronics. It's smaller, easier to put together and can do all the stuff the V1 electronics can do.
If I have misunderstood what your question is about completely, I apologize, but make sure you post links to the thing you have questions about next time.