HP Pro Tablet 608 G1 Maintenance And Service Manual page 26

3. Remove the WWAN module (3) by pulling the module away from the slot.
NOTE:
NOTE: If the WWAN antennas are not connected to the terminals on the WWAN module, the protective
sleeves must be installed on the antenna connectors, as shown in the following illustration.
Reverse this procedure to install the WWAN module.
20 Chapter 5 Removal and replacement procedures
WWAN modules are designed with a notch to prevent incorrect insertion.