I cannot answer your question. But in my opinion these types of things should be covered when you buy the MH. The dealer needs to assume that the new owner does not know enough at the time to ask the right questions. This is especially true due to the lack of really good owners manuals.
Actually if it were not for other owners I would not know what I know now. My dealer never went over anything with me even though I had said this is my first motorhome. All they wanted to do was sell it. Could care less about customer service.
What do you mean by manual jack? How to put the slide in or out manually? It will depend on which slide mechanism you have. There are several out there.