Dell Latitude 7320 Detachable Service Manual page 46

Steps
1. Align the screw holes on the heat sink with the screw holes on the system board.
2. Tighten the four captive screws that secure the heat sink to the system board as per their callout.
3. Affix the WLAN antenna grounding foil and WWAN antenna grounding foil to the heat sink.
4. Place the system board shielding cover on the system board and gently press until it snaps it into place.
Next steps
1. Install the display assembly.
2. Install the SIM card.
3. Follow the procedure in
46 Removing and installing components
After working inside your computer.