Eagle Cap quality control continues to disappoint

Yes, heater is missing a duct collar to connect hose. They just spin on into the heater hole.
From here it looks like the hose is way too short to connect but the way its ripped appears it once was connected to something.
Possibly another piece, ext or ell? The pics dont give me the impression it left factory like this..
I dont know if duct collars are brand specific (dometic/suburban) but are available.
With no hose seems most of the air would come out that open port.