In order to setup additional domains through WHM / WebHostManager, please login to the control panel and follow these steps:
1. Create a package according to the available disk space and bandwidth you have.
2. Upgrade/downgrade your primary domain name to the package you’ve created.
3. Click on ‘Create a New account’, input the necessary information.
4. Now you can access the control panel of the new domain at:
http://IP_Address/cPanel [Replace the ‘IP_address’ with given IP shown on WHM after the account was created.]