http://ciisqbg45nggykdl6rjdrq3wc64csga4vkphu66qsi65mypeitqedoad.onion/pfsense
Now click the blue Save Peer button. Back on the Peers page, click Settings to switch to that page. Click the "Enable WireGuard" checkbox under General Settings, then the blue Save button at the bottom, then the Apply Changes button.