How to Set up Cowdsec as multi-server Install

Hello,
I have this setup at home as a server. The central external interface is Nginx Proxy Manager. Here is my structure:

I found this page where it is explained but I don’t fully understand it.

https://www.linuxjournal.com/content/how-set-crowdsec-multi-server-installation

Do I follow the instructions exactly so that server 1 is my proxy manager or is there a better solution?

Thank you very much and a happy new year!