This is an adapter to secure a bowden to the top of the SingleCell enclosure by Hall Precision inside the filament feed gap.
It requires at least 1 PC4-M10 1mm pitch bowden adapters. A 2nd one can also be used for the top. You will also need a couple of M3x12 screws.
I suggest moving the bowden all the way to one side -- but it still might be a sharp angle when the extruder goes all the way to the top.
I used fine setting (0.1) to get the best threads possible.
The author hasn't provided the model origin yet.