I have a 2006, not the same model. It has one button inside on the wall under the thermostat. Should be on the wall leading up to bedroom. It controls the opening of all the slides. It is label in and out. As for the individual controls for the hydraulics. They are in the front compartment by the fluid tank.
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2006 Montana 3650RK with Improvements.
2014 Ford 6.7L PSD 4WD CC LB Dually & Hadley's.
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