An addon domain is a fully functional domain that can be created from within your control panel. Although addon domains do not have their own cPanel, you may still create email accounts, redirects, QuickInstall installations, subdomains, etc. An addon domain created in cPanel will only function if the domain is registered and pointed to the server via nameservers or an A record, you can click How To Change Nameservers to change your nameservers
Kindly follow these steps to add as an addon
1. Login to Cpanel and search for Addon Domains.
2. Add the domain name and you can also create an FTP account linked to that domain.
3. Click on Add domain button and your addon domain is created. You get a successful message 'The addon domain “yosxquisite.com.ng” has been created'.
4. Click the go back button to view the addon domain you just added
If you want to access that addon domain, go to file manager, you will find a folder with the same name as your addon domain.