Correct, that would be for an Demco/SMI
Air Force One or similar braking system, gives you proportional braking, a very nice system.
I believe Newmar started installing them standard around 2017, you can give them a call at 1-800-731-8300, they'll be happy to look it up for you, just have your coach number or VIN number handy when you call. If you call them around 7AM Eastern time you usually get through right away, by afternoon they are usually slammed...