How can I install an SSL certificate in cPanel for a specific domain?
After you got the certificate from the CA, you can go to SSL/TLS menu under the Security section after logging in to cPanel. From the SSL/TLS Manager menu, select "Install and Manage SSL for your site (HTTPS)". After selecting the domain, you can drag and drop the certificate into the appropriate text boxes. After filling the Certificate, Private Key, and Certificate Authority Bundle sections, you can click "install certificate".