To remove the wireless module, remove the 6 screws securing the base cover and the 2 screws by the hinges. Pry the cover off from the recess points near the hinges. Identify the wireless module and remove the screw securing it. Unlatch the module and disconnect the cables to remove it from the system.
To reinstall the wireless module, place it back in the system, reconnect the cables, and relatch it to the system. Tighten the screw to secure it. Place the base cover back on the system and secure it with the screws.