CWP Tutorial on Hostname SSL has an error

In Wiki it says,
http://wiki.centos-webpanel.com/hostname-ssl-with-letsencrypt

In cwp.admin left menu go to --> CWP Settings --> Change Hostname save there your hostname.

this is wrong...its actually Server Settings>Change Hostname

Can someone please update this Wiki and make it so we can actually follow it?

Also, does this even work? I dont see anything in this menu that even suggests that a Letsecnrypt SSL will be the one installed. I actually suspect it will install a self signed cert because on my server there is no Letsencrypt checkbox?

under what circumstances would the Letsencrypt option not be available? (I am using external DNS A records and domain my registrar nameservers)

I'd like to know how to do this too.