Is like asking.... Where is my house owner's manual?
Do not feel bad, I asked the same question.
What I got was a bag with a binder and each appliance has their operator's manual. One for the trailer per se is pretty much worthless. For example, to winetrize the TT I had to make my own. Anyway, that is what I do for a living, writting fabrication/assembly instructions.
Your phone camera and Open Office / MS Office / Google Drive is your friend. Take pics and caption some words.
2016 Rockwood 2306
2016 Chevy Colorado Z82 / 2009 Pontiac G8 GT