The back of the keyboard has four grip pads and you will need to remove two, (shown in the pictures), the screws are hidden under them. Then take off the screws and flip it around.
Make sure to check all the images and that your keyboard is the same.
Now take off all of the G keys (G1, G2, G3, G4, G5) and the space keys, then carefully pry at the back sides off with your fingers and push the keys through.
You NEED to take these keys off otherwise it won't come apart.