Chris, this is database information. You will need to create a database in your cPanel. Open Manage Mysql Enter the name of the database in the Db field. Click on the Add Db button. Then enter the user's name in the UserName field and the user's password in the Password field. Click on the Add User button
Then choose the specific user from the User drop-down list and the specific database to grant permissions to from the Db drop-down list. Click on the Add User to Db button. The user now has permission to use that database and sample connection strings are shown in the MySQL window. "SQL Host" is localhost, "Database name" is cpanelname_dbname, "username" is cpanelname_username, "password" is the password you created. I am not sure the specific "table prefix" they are talking about.