HP EliteDesk 800 G3 Desktop Mini, HP ProDesk 600 G3 Desktop Mini, HP ProDesk 400 G3 Desktop Mini - Maintenance and Service Guide

9. Grasp the WLAN module (3) by the sides and pull it out of the socket.
To install the WLAN module, reverse the removal procedure.
NOTE: WLAN modules are designed with a notch to prevent incorrect insertion.
WLAN module 37