Dell Latitude 7640 Service Manual page 25

Steps
1. Align the notch on the 5G WWAN card with the tab on the M.2-card slot on the system board.
2. Slide the 5G WWAN card firmly into the M.2-card slot on the system board.
3. Connect the antenna cables to the connectors on the 5G WWAN card.
4. Place the 5G WWAN-card bracket on the 5G WWAN card.
5. Align the screw hole on the 5G WWAN-card bracket with the screw hole on the system board.
6. Replace the single screw (M2x2.5) that secures the 5G WWAN-card bracket to the system board.
7. Place the 5G WWAN-card shield over the 5G WWAN card and secure it in place.
Removing and installing components 25