Dell NOT22422 Owner's Manual page 77

Steps
1. Align and place the smart-card reader with the smart-card reader FFC into the slot on the chassis.
2. Replace the two (M1.6x1.7) screws to secure the smart-card reader to the chassis.
3. Adhere the smart-card reader FFC on the palm-rest assembly.
4. Connect the smart-card reader FFC cable to the connector on the USH and SD card reader daugherboard.
5. Align and place the left speaker into the slot on the chassis.
6. Replace the two (M1.6x1.8) screws to secure the left speaker in place.
76 Removing and installing Field Replaceable Units (FRUs)