Print with high detail; there are small threads and thin walls. There is two STL files, the top and bottom. The largest piece is 1.5625" high and 4" across flats.

Your slicer may say repairs need done on the bottom but I didn't repair my model. I think the slicer doesn't like the open walls on the inside of the model. 

Lay the large usb plug in the center (don't force otherwise you may push the interior threads apart) and wind the cable around the walls; you may need to alternate between the outer and inner walls so the plug end falls in a gap.  Then screw the top into the bottom (right hand threads). I placed a hair tie around the top wall to act as “gasket” and to help align the two parts together better.