Within the section ‘Security’ and click on ‘SSL/TLS Manager ‘
Click on" Generate, view, or delete SSL certificate signing requests" under the Certificate Signing Requests (CSR) menu
Fill all the required details under "Generate a New Certificate Signing Request (CSR)" form.
Verify the details you have entered and click "Generate" button and in next page you will see generated CSR for your domain, which you can then use to activate SSL certificate for your domain