Blend door motor location

I have the SUV listed above that I have a constant clicking in my dashboard. already tried the reset does not work. looking for the actuator door or actuator motor that runs the vent system heat and defrost. I have heat on the floor and sometimes out of the frost. I do believe it's mounted at the top of the HVAC unit, not positive do not want to rip it apart until I get a hint. I do not have access to all data anymore. that I have been twisting wrenches 4/36 years was the dealership tech now unfortunately disabled and retired would appreciate any information. thank you