Creating a Dual USB Adapter

If you want to run Linux on your Xbox you will need a way to hook up your USB keyboard to the Xbox.  Each of the game ports are USB ports with a proprietary adapter.  Our goal will be to use a USB motherboard connector or USB extension cable to allow us to splice into a Game Controller cord and allow us to use it for both gaming and typing.  

Ingredients:
Xbox Controller Cord or Xbox Controller Cord Extension End (the small part that is designed to break away from the rest of the cord)
PC USB Mother Board Cord or PC USB Extension Cord
Two feet of small gauge wire
Tin Foil 2X1"
Soldier
Electrical Tape

Tools:
Soldiering Iron low wattage 15-20W is ideal (higher wattage will melt insulation of thin wires)
X-Acto knife or other sharp blade
Wire Clippers
Helping Hands (moveable alligator clips to hold things in place) 

Start by stripping a section of insulation along the controller cord.  I started with the section that is furthest from the plug that connects to the Xbox, if I had it to do over I would have chosen the section closest since it is just a little bit longer.  We will want to leave about 1/4" of insulation un-stripped on each end.  We will come to that later.

Now we will crack into the innards of the cord.  The silver braid and tinfoil is shielding, when you have long wires the tend to act as antennas and pick up radio/micro wave interference by wrapping them in shielding and grounding the shielding this dissipates most of the interference.  For now we will just cut away the shielding to get at the four wires inside.  

There now we can see what we are working with.  Now we will want to strip a small section of insulation one each wire staggering it along the wires so we have less risk of a short.

Next we will strip back the shielding on the PC USB cord and cut and strip the wires at the appropriate length to match up to the staggered solder points.

Next tin all solder points and position so they line up, quick dab of soldier on each one and it should look something like this

Now wrap each soldier point with a small piece of electrical tape.  The bundle the entire spliced area with electrical tape and wrap that with the tin foil

Now remove the 1/4" of insulation we left on either side of the spliced area.  This will reveal the shielding.  

Strip about one foot of small gauge wire and wrap over the whole mess.  Reconnecting the shielding is an important step, one or two inches of unshielded wire will not cause us a big concern but since we  have broken the link to the ground for the entire wire near the ground point if we did not repair this we would be creating a ten foot antenna out of the controller cord that will be plugged into this, at the very least we need to jumper from the start of the shielding to where it continues down the cord.

I tacked all points with a bit of soldier just to be sure that the connection was made.  

The wrap the entire splice with a bunch of electrical tape.  Tape is cheap and the more rigid you make this the less likely you will have to re-open it and connect something again.