For owners of the CR-10S Pro who have drybox and who need to connect the tube from the drybox to the extruder. There is currently no way to connect it and it just flops about randomly.
To install, just slide this part over the side of the extruder body; it will stay pressure-fitted. Then insert the tubing (also pressure-fitted). Confirmed fit with tubing of 6.5mm outer diameter (i.e. Polymaker Polybox's tubing).
Modified off the Thing made by user shaka89 : https://www.thingiverse.com/thing:3236511.
I printed it in PETG but it should work with PLA too.
Let me know if you need it for your tubing that's a custom outer diameter.