You can export all the connection definition to a KDE menu on your desktop.
The on-demand mode works like this. You try to access a new host in n/adminfs (well, not a host, but a name). Say you do:
Since foo does not exist, a pop-up shows up asking the specification of the adminfs connection (host, accounts, directory,vserver). Once filled the connection is established using litefs-ssh. A pop-up shows up to request the ssh password.