http://ciisqbg45nggykdl6rjdrq3wc64csga4vkphu66qsi65mypeitqedoad.onion/pfsense
Click the "VPN" menu at the top and select "OpenVPN". That puts you in the "Servers" section by default, so click the "Clients" section then click the green "Add" button in the bottom right. Under "General Information", type in whatever description you want ("CS Singapore UDP", etc.).