How to addon domain to existing path
1. Kindly login to the Cpanel with with the URL as http://domainname.com/cpanel
or https://domain_name:2083 (with SSL) or http://domain_name:2082 (NON SSL).
2. Click on "Addon Domains" under "Domains" to proceed.
3. Fill in domain name and assign the domain's "Document Root" as below example.
4. Successfully add on the domain.