For this step I would suggest using 5mm LEDs because they make instillation much easier.

First we will do the easy side and that would happen to be the left side. This is because there are already holes that are the perfect size.

1. Pick where you want to install your LEDs and slide them into the holes, make sure you push them in as far as they can go.
2. Next take the 2 wires coming off the LED's and pull them inside through a hole next to the LED.
3. Now take the LED's wires that you installed on the left side and solder all the negatives together
4. Now do the same thing with the positives just make sure the - and + aren't touching and make sure not to drip solder on the motherboard.

Time for the right side. This side is a little tricky because the hole on this side are way to small for our LED's. So you will have to drill out some holes and make sure they are the right size.

1. Mark the holes where you are going to drill for however many LEDs you want on that side.
2. Drill out the holes with a bit that is closest to the size of your LEDs. Make sure to clean out your metal shavings when you are done!!!
3. 3. Now take the LED's wires that you installed on the right side and solder all the negatives together
4. Now do the same thing with the positives just make sure the - and + aren't touching and make sure not to drip solder on the motherboard.

Now to wire them all up!

1. Now since the right side set of LEDs are wired we can attach about 1 foot or more of 3awg to both a + and a - on one of the LEDs (which led doesn't matter because they are all wired as one but I would recommend the LED closest to the back for easy wiring)
2. Run the newly installed wires to the left side set of LEDs as cleanly and hidden as possible.
3. Solder the right side set of LED's + to the left side set of LED's +
4. Now do the same thing for the -'s

Now all the LEDs are wired in a parallel and you will only have to install one resistor for all of them!

To figure out what resistor to install use this calculator and make sure you use the parallel calculator, also our input is 12v

Calculator= [ Register or Signin to view external links. ]

1. Once you find out what resistor to use wire it in on the positive lead of the LEDs.
2. Attach about 3-6" of 30awg to the other end of the resistor.
3. Solder about 3-6" of 30awg to the negative lead of the LEDs
4.Strip a good amount off of both + and - wires
5. Remove the 4 pin dual fan power connector
6. Look at my illustration on where to install the wires.
7. Replace 4 pin dual fan power connector once wires are installed

Now power on you xbox 360 to test you work and if you did everything correctly the LEDs should come to life!