If you are going to add domain(s) within your hosting panel, you may follow this. First go to your email where you able to see your credential login.
Go to drop down menu on the left panel > Domains > Domains.
Find green box button called Add new domain.
On the pop up box menu, fill your desired domain name as well the file path. Make sure you adding extra / character on path field, so Add New Domain function is appeared. Press Add new domain button to complete the task.
If you wish to use our name server, please make sure you read our Default name servers first.
At the moment your domain still can't be accessed yet. Therefore, make sure you add the newly added domain from hosting panel to our DNS server. See here how to add domain to DNS server.