These cable guides are for the Dewalt USB Charger(DCB094K) and the matching USB-C cable.  The cable should be able to loop around the adapter 3 times with a little slack at the turns. Two guides will need to be printed, one for each side. 

It only took me 25 minutes to print the pair on a Prusa Mini. I used PLA but that may not be the ideal filament. Hot glue worked well to glue these to the sides.

I am unsure why this adapter did not come with these guides but they should. 

01/10/23 Update: the hot glue failed, another super glue would work better.