I'm not 100% sure but it looks like they want you to forward your domain to that IP. second level domain is just the main part of your domain just like this: subdomain.secondLevel.toplevel. If I had to guess. They want you to add an A Name record to propagate in 28800 seconds(8 hours).
You need to go to My Products > Domains > Manage > DNS Record > Add Record
~Jan Mykhail Hasselbring Web Administrator @ fullstackwebsolution.com