Remove the golden antenna cable from the socket. Be very careful, and use a spudger.

Remove the screw.

The WiFi module will jump up when the screw is removed. Slide the WiFi module out.

Wear gloves to avoid touching the antenna or the antenna sockets.

To install the new Wifi module, slide the new WiFi module in, push it down, and drive the screw back in.

Reattach the antenna.