Unplug: Disconnect the charging cable from the vehicle first, then from the terminal, and store it safely in the boot.
Plug: Take the charging cable from the boot and connect the blue end into the car first. Swipe the card or charge fob on the charge post. A light will flash to tell you which socket is available - position the cable in the socket, turn, and push. The light will flash from red to green to show it's charging and you can check on the dashboard in the vehicle to confirm this as well.