Cpanel: change ssl port for apache
The title it’s choosen to have cpanel word in it because changing ssl port from 443 to something else directly in http.conf will bring trouble when you create a new account for instance (cpanel rebuilds http.conf automatically)
so keeping things short go to /var/cpanel and:
sudo vi cpanel.config
change apache_ssl_port=0.0.0.0:443 to apache_ssl_port=0.0.0.0:new_port
then:
sudo /usr/local/cpanel/whostmgr/bin/whostmgr2 --updatetweaksettings