Remove the (2) 9mm Torx screws securing the Faraday cage (looks something like a cheese grater) to the Upper Housing, with a T10 Torxdriver.

Then remove the (4) 19mm Torx screws that mount the Drive Carrier to the Upper Housing with a T10 Torxdriver. 2 of the screws are located on the right side of the Drive Carrier near the center and 2 screws are located on left side, near the upper and lower corners.