Hello [email protected],
Thank you for your question. If you want to host an additional domain in your account, first make sure it is registered.
Then add it to your cpanel as an Addon Domain. This will create a new folder for storing the website files in the public_html folder.
You can then install a program using Softaculous, or upload your website using FTP.
If you have any further questions, feel free to post them below.
Thank you,
-John-Paul