Dell Precision T7600 (Mid 2012) - Manual (Page 30)

6. Slide the opposite edge of the front I/O panel outward to disengage the I/O module from the chassis.
7. Remove the screws that secure the USB 3.0 module to the front I/O panel and remove it from the computer.
8. Remove the screws that secure the front I/O panel and remove it from the computer.
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