Here you can see the pole that the screw went in. You can remove this, which allows you to remove the power button and the white housing.
Also, here is the battery terminal (spring loaded) which had to be forced out. It's held in the tube by the expansion ring, which unfortunately is the best-made bit of this keyboard. I forced it out using a long screw driver, but unfortunately broke the wires. Keyboard had died anyway, thanks Apple.