It's in the big circular room before the big circular outside area. In the center, there's a round place with some Imperials on it, there are 5 things that jut out from it, you gotta zap them all with lightning.
It seems to be so obvious that you know what I don't. Take me through this emptyness where you can build a home.-ULTRASPANK "Click"
Honestly, I missed it the first time through. I mean, I knew that was a tractor beam support for the ore driver, but I assumed that the control or power source for it would be down below and that was what I had to destroy. By the time I realized the mistake, the game would not let me backtrack, the door had shut behind me and would not open.