I'm doing the quest "Central Zone Guardian" I'm at the point where I need to activate L5-65. In order to do that I need power cores. In the quest journal, it says I have three out of the required four. I spoke to the central maintenance droid who said I should check with the industrial zones maintenance droid. When I speak to him, he doesn't have any.
I've looked around and can't find the last core. If anybody could help me out here I would be very appreciative.