San JamarC3400EH Stainless Steel Surface-Mount Beverage Cup Dispenser, 350 mL-710 mL Cup Size, Paper, Horizontal Mounting Position

How is it installed undercounter?

What is the cut out hole size for in counter installation

Can this be hung on a wall so the cup comes through the bottom? The picture only shows being able to pull it our of the top. Thank you

Can this be mounted vertically? Like down thru a counter top and the cup is pulled out from the top of the counter?