Flip the controller over so the underside would face up

Remove four of 7.1mm screws with a JIS #1 screwdriver

Remove two 4.0mm screws located on the handle with the JIS #1screwdriver.

Remove two 7.1 mm screws on the small area that stick out from the surface with the JIS #1 screwdriver

Use an extension with the JIS #1 screwdriver in order to get to the screws with yellow marks because they locate deep inside the holes.