To remove the wireless module, loosen the screw and slide the base cover off the system to remove it. Identify the hard drive module and press the blue tabs to unlatch it. Lift the module out of the system. Find the wireless module and remove the screw. Unlatch and disconnect the cables to remove the module from the system.
To reinstall the wireless module, place it back in the system and reconnect the cables. Relatch the module and tighten the screw to secure it. Relatch the hard drive module to the system. Slide the base cover back on the system and tighten it with the screw.