I apologize for the frustration, level design is still a bit behind:) When you put the fuses in the control unit, it becomes "active" and you can click on it to open the doors around, just follow the wires on the floor. Animated sprites are on my list, I will bump the priority on them. That could make the control units and elevators easier to spot. Thanks for feedback and have fun!
I tried clicking on the picture of the control unit on the right side of this screen, but that didn't do anything, either. Doors are all still closed.