Pushed Backups vs scheduled backups

NBU 7.6.1.1

Appliances on Suse.

I have been looking for information on "Pushed backups" and seem to only pull up "Pushed client updates." We have a hanful of servers, appliances of a different kind, that insist on only being able to Push backups to the NBU media server.  Ok, how do I set up the pushing client in order for it to send it's backup to my NBU appliance?  Can seem to figure out the right key words to use to find it in the KB.  Used to be able to do this and all that was required was the login credentials, but can't seem to find any info on it in th e7.6 world.

Any assistance would be appreciated.