First you need to login to the Control Panel on your Domain Register's website and edit the nameserver records for your domain to point it to our name servers. (ns1.x10hosting.com & ns2.x10hosting.com)
The login to cPanel and add your domain to the Parked Domains section.
Done. (Note: it may take a couple of hours for the changes to take effect, and you will need to flush your DNS and clear your cache.)