We have a 2013 Windjammer 2809. It does have a "Battery diconnect" in the front compartment with the propane tanks as you've described.
My only question is; which is on and which is off?
The switch can be pushed in or pulled out; the books for my trailer don't say one word about the battery disconnect.
I've also noticed that I'm not getting a reading on the panel in the trailer unless the trailer is plugged into the ground power.
I'm thinking something is not connected correctly. With the trailer plugged into the tow vehicle I should be getting at least lights on the panel, but nothing. I'm heading back over to the dealership on Wednesday prior to our trip to have them check the trailer.
thanks in advance for any assistance.
The disconnect switch is to the right of the bottom of the propane tank.