I purchased Builttospec's lighting kit for my TOM about a month ago and it works great, I just wanted to add an on/off switch to the setup. I designed a small cap to fit into the front right hole in my machine and installed a radio shack (275-011A) switch. The wires run down the front side and under the acrylic plate.

builttospecstore.storenvy.com/products/48569-makerbot-lighting-kit-white-leds

Once printed, the button hole might need to be sanded slightly to make it fit snugly. The nut on the underside isn't super tight, but everything is so close anyways, it isn't a huge concern. Other than that, wire your LED strip's power through the switch before the 12v connector and you're done!