Here is another video I did showing you how to put in some LEDs in your cup http://www.youtube.com/watch?v=HsFoNeTKG7gholders.

 

i like to use solder and use heat shrink tubing

 

yeah thats what I have been doing lately since I got better at soldering. I made this video for a friend who wanted to try this mod but wasn't good at things like this, so I did it the easiest way i could think of, which butt connectors was the way.