Where is the battery disconnect switch in a 1997 Leisure Travel Widebody?

[henknoordermeer]

Hi,

I've been looking all over our Leisure Travel van. It's a 1997 Widebody on a dodge B3500 chassis. It has the rear electric sofa layout.

I've been trying to locate a battery disconnect switch for the house battery but can not find it. Was it not installed per the factory?
I found the converter and fuse box panel under the drivers side of the rear couch. That's where all wiring comes together and the AC transfer switch is also located. I did find what seems to be a 12V reset circuit breaker (similar to this: reset circuit breaker example), but no manual disconnect switch.

I'd like to be able to disconnect all power drain from the coach battery while not using the RV.
Am I just not finding it? Or can i install one easily in some spot that makes sense (thinking of wiring ease, accesibility, and an area where it makes sense and can be found

Thanks in advance,