From what I have seen the newly installed battery disconnect was introduced on later 2012 models, at least on the Shamrock and Roo for example.
It could be a case where your model, an early 2012, was built prior to the change.
Could that be the case ?
'cause, I think it's pretty obvious to see it inside if is is in fact installed.
Notice the fine print in the brochure: changes and mods can be made at any time.
Denis & Diane
2010 Sabre 31REDS
Ford F-250 2011
* Happy Campers *