SSL redirection can be found in WHM >> Tweak Settings >> Redirection
Always redirect to SSL [?] On Off = off
Non-SSL redirect destination = Origin Domain Name
Hostname
Origin Domain Name default
SSL redirect destination = Origin Domain Name
SSL Certificate Name default
Hostname
Origin Domain Name
Logout redirection URL = No redirection default
If you would like for the domain.com/cpanel to work again:
Modify WHM >> Tweak Settings >> Security
Require SSL = off
or
Modify the /var/cpanel/cpanel.config file setting
requiressl=1
reset to
requiressl=0
and restarted cpanel