The instructions can be found at the bottom of the following page:
http://groovygamegear.com/webstore/index.php?main_page=product_info&cPath=74&products_id=270"Wiring the RGB OverDrive™ lighting module:
There are 4 wires connected to the lighting module. The one marked with red is to be connected to a 5v DC power source. The other wires, in order following the 5v wire are Blue, Green and Red control lines. If you own an LED-Wiz™, these would be connected to 3 outputs of your choosing. Otherwise, to hard wire a specific color, just attach the desired colors control line to ground. This can be done in any combination you desire to achieve one of 7 colors, or small resistors can be added in series to create any color desired."
Also,I've done further testing on my end and came up with the following guideline:
Primary Colors:Red Wire = +5v source - Connect this with the following to form that color:
1st Wire = Blue LED color (ground)
2nd Wire = Green LED color (ground)
3rd Wire = Red LED color (ground)
Additional colors:1st Wire + 2nd Wire = Light Blue color (ground)
2nd Wire + 3rd Wire = Yellow color (ground)
1st Wire + 3rd Wire = Purple color (ground)
1st Wire + 2nd Wire + 3rd Wire = White color (ground)
Hope this helps!
~ DeLuSioNaL