The first thing you want to do, is remove one of your PCI expansion bay covers from the rear of your case. This will allow you to install the PCI slot board for the LED kit.
The LED cable will use clips to assist in mounting it to the case. Just a clean towel and rubbing alcohol, before applying a clip onto your case. This promotes better adhesion for the double side tape on the clips. Once you have them installed, clip your LED cable onto it and plug the connector into the PCI board. From here you can install the Molex connector and turn on your PC.
* Please note some users will experience an issue with ASUS motherboard that have armor plating on them and installing the PCI slot board.