Yes, the installation instructions. I bought a used Scout with those accessories installed and no paperwork. I’d like to a) insure the proper parts are all installed and b) they are installed correctly.
The seat and pegs are just bolt-on parts. If they are on there they are OK. A trip to a dealer will allow you to compare with a new bike.
The saddle bags have one thing to be careful about. When you put them on the bike, the metal half-circle piece must be correctly in place behind the spool before you fold down the levers. If that is not correctly placed the bags can fall off if they vibrate loose.