Thanks zEitEr for the link and guide!
Do I need to move my website files to the folder secure folder? this making me confusedAll secure files need to be uploaded to the /domains/domain.com/private_html directory. You may upload using the control panel's built-in file manager or FTP. For example,
/domains/domain.com/private_html/index.html ---> https://www.yourdomain.com/index.html
/domains/domain.com/private_html/secure/index.html ---> https://www.yourdomain.com/secure/index.html
The private_html directory operates the exact same way as the public_html directory.
Note: You will not see a private_html directory if the SSL feature isn't enabled on your account.
Thanks zEitEr but my goal is not change anything on public_html and files/data there. I only need to have https for my site.That depends on your goals. If you don't need separate content for HTTP and HTTPS, then use a symbolic link from private_html to public_html.