In this step we will be removing the bottom panel from the rest of the controller. This is necessary in order to access the inside components of the controller.
WARNING: Use caution when removing the bottom grip panel. Many of the buttons and components are held only loosely by the front panel and can fall out. Be sure to set screws aside carefully.
Place the controller (buttons down) on a solid surface.
Remove the six 9.2mm Tri-wing Y0 screws that hold the back panel in place.
Gently lift the back panel up, separating it from the front panel.