Lift up and remove the silver EMI fingers located above the ports on the left side of the computer.

Pull back on the orange optical drive cable with one hand, and use your other hand to lift the front section of the metal framework over the optical drive cable.

Deroute the microphone cable from its channel in the upper right corner of the framework.

The metal framework should now be free can be removed from the computer. Be careful when removing the metal framework that none of the cables get caught on the framework.