Create an addon domain in cPanel

Click “Domains” under the “Domains” section.

Click the “Create A New Domain” button.

Enter the domain name to add in the “Domain” text box.

Deselect the “Share document root (/home/username/public_html) with “domain.tld” option; 

or Enter the directory where you want the files for this domain to exist.

Click the “Submit” button.