Lack Enclosure Reverse-Bowden pass-through

This is a an adapter for filament pass-through from a filament spool holder outside of a Lack Enclosure, to a reverse-bowden tube, used to prevent filament unspooling and sudden filament tension changes on a direct-drive extruder.
I've been using this for months with my Prusa Mk3 and my (extended) Lack enclosure (with my enclosure parts, which I'll be sharing soon, which are improvements on the Prusa design)

Update: 01/25 - I've uploaded version 2 of this which has an M6x1 thread for couplin