Connect the Ethernet cable with your camera´s Ethernet port. Then plug in the other end of the Ethernet cable to a free LAN port on your internet router.
Now attach the WiFi antenna and make sure that the antenna cable is still connected to the WiFi board (see step #3 Here).
Fasten the mainboard slide and use the 4 screws to mount the back plate back onto your camera casing. Screw the wall mount to the back of the camera.
Install your camera and plug in the power supply. The camera should automatically reconnect itself to your WiFi network.