Hi Gary,
I saw Scott's reply to you on this in the Ask the Factory forum. Just wanted to let you know what I did in my last TT.
I added a battery disconnect so I could cut-off all current draw from the battery when the trailer was in storage between trips.
I ended up using 1 switch brand/model for the
first mod and then later, my application changed and I used a different brand/model for the
second mod.
In any event, for a simple ON/OFF disconnect, consider the Blue Sea Systems models.
Here's a link to them at West Marine.
Jim