Open the wifi manager addon from APPS -> Programs addons -> wifi manager.
Press "Add" to browse available networks
From the available network list select SSID of the network you want to connect to and press "OK" button on the remote.
Once prompted, enter your network access credentials and press done.
Look for the status messages, it should show "Connecting -> IP config -> Connected"
Once connection is successfully established a new connection is created with the SSID of your network.
Verify status showing both local network and internet connectivity.
Navigate to the "Cancel" button (since you are done with the configuration) to exit the addon.
Thats it you are done.