I'm afraid all the T6s have the same sticker. Mine has the same sticker but definitely without the second system. I would think the configuration sticker under dash has the information if you compare those.The best way to prove if you have AC to your rear unit is pop the bonnet and find the gas AC sticker. If it shows two values of gas you have two systems. Here is mine from my gen six caravelle.
You can also see drops out the back as well as the front on your driveway on a hot day...
View attachment 25268
Velle SE here and it feels like it is taking air from the front.I think the three zone climatronic gets sitcom in the rear and the climatic system is just a blower / fan in the rear and air con in the front. Correct me if I’m wrong. Would be interested to see any what other SE spec owners have ?