..joking aside. I have a TT and I cant find any videos showing how to install on a dual tank system. I suppose its not really the niche for the extend-a-stay, on a dual tank TT you can just take a bottle off and go fill it, where as it seems that many coaches have the P tanks mounted in place.
My TT was marketed with "a full size bbq hookup right off of your propane tanks.
When I bought the TT I did not find "the full size bbq hookup" but I did find docs for an "extend-a-stay" mixed in with the paperwork, so I presume that's what it was..