HP ZBook 15 G4 Maintenance And Service Manual page 54

3. Remove the WWAN module (3) by pulling the module away from the slot at an angle.
NOTE:
NOTE: If the WWAN antenna cables are not connected to the terminals on the WWAN module, protective
sleeves should be installed on the antenna connectors, as shown in the following illustration.
Reverse this procedure to install the WWAN module.
44 Chapter 5 Removal and replacement procedures for Authorized Service Provider parts
WWAN modules are notched to prevent incorrect installation.