Remove the two 6.4 mm‑long screws from the L1 and R1 button enclosures (one screw on each side).

Use a JIS J0 driver or an official iFixit Phillips PH0 driver, which is designed to be cross-compatible with JIS screws. Using a screwdriver other than an official iFixit screwdriver or a JIS screwdriver may result in stripped screws.