How to set up ffmpeg + nginx rtpm?

Question

Nginx

how to register in nginx conf so that they broadcast simultaneously to three outgoing streams (on the right, 1 and 2 work like that, but the 3rd one I don’t understand how)
https://pp.userapi.com/c844723/v844723097/cf34a/Yi...
hid the tokens , well, that's where the arrow needs to be turned over and permission to shrink
https://pp.userapi.com/c844723/v844723097/cf366/ja...
I did everything according to the instructions, and then this idea appeared. I don’t understand how to insert what where)