Make sure that your Wi-Fi is enabled, then click the Wireless Network icon in the bottom right corner of your desktop and choose to connect to SSU-SECURE.
If you are asked, Trust the certificate. You should now be connected to the SSU-SECURE Wi-Fi network!
If you are having difficulties connecting to Wi-Fi, you may need to forget the network. To do so, click the Network icon on the lower right corner of your screen, then select "Network & Internet Settings".