* To generate csr go to

whm >> Web SSL/TLS >> Generate a SSL Certificate and Signing Request
Add the information as per requested
click on create button.
It will create .csr and .key file.

* To install ssl certificate go to

whm >> Web SSL/TLS >> Install a SSL Certificate and Setup the Domain
Paste the ssl certificate in 1st text box
press the Tab button on keyboard and domain name, user and ip automatically added, if not then add it manually.
Paste .key file in second text box
Paste .ca-bundle file in 3rd text box
Click on submit button it will install ssl certificate.