"One part I found particularly difficult to fit was under the arrow keys...so I routed the cable around the keys. Next you need to drill a hole somewhere in the bottom of the keyboard where you can route the power cable for the EL Cable out. The MS Natural Elite has a hollowed out back which allows me to route it out underneath the keyboard. And even though I have no pictures of it, I can also fit the Battery/Inverter box underneath the keyboard. (I'll try to get a picture of this up soon) It's possible to extend the power cable so that you can tape the cable to the Keyboard cable and mount the inverter somewhere in you case. (I may be doing this at some point)."
FULL STORY @ VIRTUALHIDEOUT (http://www.virtualhideout.net/guides/keyboard_el/index.shtml)