From the EMAIL section, click "Calendars and contacts"
On the next page, retrieve the username and the server address to configure them on your Apple device:
Some applications have limited support for retrieving CardDAV account information from the server. In this case, you need a direct URL, which is displayed at the bottom of the Calendars and contacts page.
Conclusion:
You have learned how to retrieve the information needed to synchronize the CardDAV address book from your cPanel