CWP with NitroPack Config Question

I am trying to set up NitroPack (a page speed caching site) via a Wordpress plugin but I get an error when NitroPack tries to cache my website saying that I am already using a caching plugin (which I am not). I found out that Im getting this error due to using NGINX and Varnish. Luckily NitoPack has an integration for such cases. Problem is, I dont know the details to put in the settings of NitroPack to remedy the problem. Here is the settings I need to fill in on NP.....

https://support.nitropack.io/hc/en-us/articles/1500002327501-Reverse-Proxy-Integration-Varnish-NGINX-etc-

My CWP webserver is set to : Nginx & Varnish & Apache

Ports :

Nginx: 80,443
Varnish: 82
Apache: 8181,8443

Has anyone successfully set up NP with a Wordpress site on CWP? If so I need some help here.

You need to add the public ip to nitropack as nginx is the reverse proxy and it is infront of varnish and apache server.

I see that I put the ip in the "List of IP's" but what do I put in the "URL for performing a complete purge"?