Chances are, you have a spare XBox controller cable lying around (in my case, from making StepMania dance mats) and a female USB connector, soldered in some useless piece of electronics. With those parts it is child's play to make an adapter.
These adapters are simple and common builds, however, they often end up looking terrible, and taking up room. My version is small, sleek, and doesn't require modifying XBox hardware.
Step 1: Gather Materials
-XBox Controller cable or extension
-Junk USB Female connector
-Hot Glue gun
once you've got these, the fun can start.
Step 2: Open XBox Plug
First, use the knife to cut the cable off the XBox connector and cut the strain relief flush with the plastic casing.
Then, use the Flathead to lever the casing open by inserting it where the wire enters and twisting. It is ok to mar the edge at the end of the casing, as this part will be removed later.
Step 3: Remove Shield and Wires
then, heat your soldering iron and carefully remove each wire without breaking the traces or de-tinning them.