High Altitude Kit for Dometic three-way refrigerator 2016 Outback MaxS

I like in Missoula, MT, 3,500 ft. My new Tab came with instructions for the high-altitude kit for the propane side of the three-way refrigerator (needed at altitudes above 4,000 feet). I asked the dealer's service representative whether the Tab came with the high-altitude propane kit installed. He had no idea, having never heard of such a thing. Presumably, the dealer knows what the dealer ordered or Little Guy knows what was installed on a certain Tab based on the serial number. Does anyone know whether there's an easier way to figure out whether the high-altitude kit has been installed?