I am working on my neopixel build and just got the hilt side adapter for the PCB but it does not stay in.

Parts I have are:

MHSV2 Blade Holder Style 8
MHS V2 Choke Style 1
1" NeoPixel Hilt Side Adapter V2

Shouldn't the Hilt Side adapter lock in place between the choke and the blade holder? It just slides out the front. Is there a piece I am missing?