First, make a order of SSL certificate.
After payment access your Client area >> Services, and click in view details of certificate SSL
In next page, click in View certificate Details
In Cpanel, access SSL / TLS:
After this click in generate, view, or delete SSL certificate signing requests.
After this your CSR, your CSR will be generated, select and put in the Client Area
After you submit your CSR and data of SSL, you will see this page:
We prefer the first(HTTP based validation), but you can choice others, to receive e-mail.