Congrats on your new purchace. I will hopefully be buying a travel trailer very soon.
Used to own a couple of pups, seem to remember what your talking about. Only thing is
I don't remember a "hinge" I seem to remember sticking the pole in a holder down by the bumper
and then the poles were flat on the other end. That slipped into a metal "bracket" under the bed end.
I am new to the forum in the last few days and just wanted to welcome you. There seems to be many
very knowledgeable people here so check back often and hopefully they can answer your question better than I.
Also, you did not state the year of your camper. Did you purchace from a dealer? He may be able to answer
your question. Good luck