My Farouk Chi Hair Straightener power cable is loose?

The power cable that connects into the 2 arms of the hair straightener is loose inside . I am sure i can fix the wiring inside once i get the iron opened. And thats the problem. I did open the side covers, and tried to open the Phillips head screws. but it seems that the screw is the same on both the sides and just keeps rotating. I tried to hold the other side firmly but it still doesnt open.
is there another way to do this?
Any help would be appreciated.