Owner's manuals suffer long on legalize and short on details of your RV. They are full of such helpful advice as 'wear your seatbelt' and 'don't use harsh cleaners' but they don't tell you where the fuse for the porch light is located. The manuals have to be vetted by lawyers and don't reflect every model or option your RV might have, they also don't get rewritten when things change during assembly.
If you want to read owner's manuals for similar RVs, Fleetwood
, and others have manuals available to read or download on line.
As to your RV, go through every closet, cabinet, and compartment and write down make and model number of every component you find. Also note fuses or circuit breakers when you encounter them. Then on a rainy day use Google to search for the manuals for those components. You'll quickly have PDF files on each component, how to operate it, troubleshoot problems, even parts lists. A very good use of your time!