Microsoft XBOX CONTROLLER Repair Instructions page 28

Procedure – Installation (Bumper)
1. Install Bumper Cap
Gently place the bumper on the controller, making sure that the inner posts slot into the
controller, not over the mid-frame.
2. Hook Bumper Clips
Using a plastic pry tool, hook the left and right edge clips of the bumper to the mid-frame
and press down. You will hear a "click" when everything is properly seated into place.
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