This coupler is used to connect a piece of PTFE tube to the feeder, and have it go through a hole in the filament hatch, in order to use external filament holders with the hatch closed.
I use it with the 1kg spool holder for monoprice voxel by Ryoichi Kato and a filament guide.
It is a remix of the External Filament Mod - Flashforge Adventurer 3 Coupler V3 by Albert Soler, with the following changes:
The screw connectors are from the Locking bowden connector by Nicholas Christopoulos.
The External Filament Mod - Flashforge Adventurer 3 also includes a useful guide for drilling a hole through the hatch.
Different printer versions
There are newer version of the printer that this coupler doesn't fit.
If you have such a version, maybe the External Filament Mod for Flashforge New Adventurer 3 and Lite by Shinobu Takahashi will work instead.
Things
Print Settings (used for the objects in the photos)
The author marked this model as their own original creation. Imported from Thingiverse.