How to Rig Your 360 Controller
- 1). Press the release button on the rig to open it up. Align the Xbox 360 controller with the opening of the rig and slide the controller inside the external casing.
- 2). Close the rig by moving the release button in the opposite direction you moved it to open it. You will feel and hear a click when the rig has closed completely.
- 3). Adjust the "RT" and "LT" firing straps, front and triggers and the finite triggers for the "X," "Y" and "B" buttons so they press the buttons when used. Fine-tune each component for optimal performance.
Source...