HP Pro x2 612 G2 Maintenance And Service Manual page 48

NOTE: If the antenna cables are not connected to the terminals on the module, protective sleeves should be
installed on the antenna connectors, as shown in the following illustration.
Reverse this procedure to replace the WWAN or GPS module (select products only).
NOTE: Make sure the MAIN antenna is attached to the connector marked MAIN and the AUX antenna is
attached to the connector marked AUX.
42 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts