Battery Issues

Got my 2016 179 about a month ago, had it out for a 3-day test spin, no problems.  After 2 weeks in storage, not connected to power, the batteries are dead.  I know I had everything off, all the lights, everything.  I understand from reading here that this is not unusual.  It's not an option to have it connected to power where it's stored. 
So a couple questions; do the Rpods have a "Master" shut-off switch that shuts everything off?  I didn't see anything that looks like that in the breaker/fuse box.  It would not be very convienent to have to disconnect the batteries every time it's stored.  I have seen postings here where people talk about installing a "battery disconnect", but I'm not sure how that would work with a 2-battery set up.  I've looked some online, the "Battery Doctor" looks pretty good, but I don't know.

Here's a couple pics of the battery set-up:

Two weeks with nothing on? New dual batteries? What kinda batteries? Both the same and new?

Furpod, I like it!  That's a great idea, so the connections are inside of the box, not exposed to the weather.  So that's the type that has a removable "key", right?

Originally posted by CFWARREN Furpod, I like it!  That's a great idea, so the connections are inside of the box, not exposed to the weather.  So that's the type that has a removable "key", right?

Yes removable key.. hence the lanyard.. Mine is "Hella" brand, available on Amazon..

im sure someone would correct me if im wronge but the Maring/RV are the wronge type, due to the way they are build on the inside. The deep cycle batteries are made to hold charges at cold temps for longer period times and also have longer life span for the type of use that TTs do, if everything was off and there is no other explanation for them going dead, especially after 2 wks of storage, i would have to say they are not truly deep cycle and see if the dealer could do something about that.