If the Certificate Signing Request was not created yet, please generate CSR inside from cPanel>SSL/TSL.
After
the certificate has been issued, and sent to you by the Certificate
Authority, you can proceed with deploying the certificate on the server.
Follow the steps below to install the SSL for your site.
1. Log in to your cPanel account
2. Locate and click on SSL/TLS Manager in the Security section.
3. Click on 'Manage SSL Sites' under Install and the Manage SSL for your website (HTTPS) menu
4.
Copy the certificate code you received from the Certificate Authority
including -----BEGIN CERTIFICATE----- and -----END CERTIFICATE----- and
paste it into the 'Certificate: (CRT)' field on the next page.
5. Click on the Autofill by Certificate
button, which appears next to the certificate entered, and the system
will attempt to fetch the domain name and the private key. You may also
choose the domain from the drop-down list and manually enter the
certificate and private key into the corresponding boxes. If the system
fails to fetch the private key, you can locate it in the Private Keys (KEY) section of the SSL/TLS Manager. Please remember to include Begin/End headers and footers for the certificate and the key.
6. Copy and paste the chain of intermediate certificates (CA Bundle) into the box under Certificate Authority Bundle (CABUNDLE)
7. Click on the 'Install Certificate' button
Congratulations!
The certificate is now installed on the server for your site. The site
should now be accessible via https://. You can check the installation
using this tool: https://sslchecker.com/