cPanel 11
 
SSL/TLS Manager: Manage SSL Hosts

This interface lets you configure SSL for your domains.

An SSL certificate can secure one or more domains; to create an SSL host for a domain, you must have a certificate that secures that domain. Each SSL certificate has a matching key file that must also be present to install the certificate. SSL certificates for production use usually also require a CA bundle, which this page will automatically try to obtain from the server; in the event that the server cannot find the required CA bundle, you will need to paste it here.

Manage Installed SSL Websites

Install an SSL Website

204.15.251.31
The certificate may already be on your server. You can either paste the certificate here or try to retrieve it for your domain.
The private key may already be on your server. You can either paste the private key here or try to retrieve the matching key for your certificate.
Optional
In most cases, you do not need to supply the CA bundle because the server will fetch it from a public repository during installation.