If you would like to host a new domain inside same cPanel account, you can the domain.
In cPanel there is a feature 'Addon Domain' that allow you to add domain.
1. Login to your cPanel
2. Scroll to Domains section.
3. Click on Addons Domain to add the domain.
Kindly note that, the name server of the domain should be pointed to your hosting account.
Only then the domain can be added as addon domain.
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