Hi and welcome! Enjoy your new camper!
I can not help you with a manual, except that if it exists, it may not answer your questions. The usage of the individual appliances is usually described in individual manuals, and the camper manuals tend to be a bit generic. You may also try a forum search, or a google search.
This is a 1993 Lance manual; it may be able to answer some questions (Lance have all manuals online going back to 1993):
https://www.lancecamper.com/docs/1993-owners-manual.pdfTo post a photo here, you can use this service and follow the instructions on the page:
http://photoposting.is-great.net/?i=1