Congrats on the new trailer!
You can download a manual from CruiserRV here:
It has some good info, but it's pretty generic and not specific to any model.
To get more detailed info, find the manufacturer & model numbers of your all of appliances; fridge, stove, water heater, AC, etc., and you should be able to find the manuals for each of them online. The individual manuals will give you detailed operating instructions.