Hedgenext-server behind nginx

I have nextcloud running behind nginx as a proxy, and it works great. I would like to use hedgenext, so I installed it in my nextcloud web instance. But how do I actually access it? The only setting I see is when I go to “Additional Settings”, there is a textbox to enter the “URL of the HedgeNext instance” and a link to show “Internal Secret Key for Hedge”.

Do I need to set something up with nginx? Or can it be something like “mynextcloud.com/hedgenext”?