How to make WHM to non secure to secure redirect permant

Once you login visit this section:

WHM >> Server Configuration >> Tweak Settings >> Redirection section and tick the top box for "Always redirect users to the SSL/TLS....." Next tick the Hostname and SSL Certificate Name respectively and save.

Closer all browser windows, then open one and go back to https://domainname:2087/ login and accept the security Certificate into your browser and you're good to go.