Firstly, check in Cpanel under Security > SSL/TLS Manager
At the bottom of the page you will see the Shared SSL Certificate URLfor your website/domain.
e.g https://centos1.website-ssl.com/~username/
Use this URL to prefix any file you wish to secure in your code and hyperlinks.
e.g. https://centos1.website-ssl.com/~account/mysecurepage.php
Email any time or call 01480 26 00 00 014 80 26 00 00