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

10. Insert a Phillips screwdriver in each knock-out feature and rotate (3) to remove the blank.
11. Feed the external antenna cable through each hole and screw the antenna into position.
12. Connect the external antenna cables to the WLAN module.
Reverse the removal procedure to install the WLAN antennas and transceivers.
External antenna 39