Hmm well that is a bit of an issue I guess when we wrote that we were thinking about when the buda is siting on a desk pointing up after getting it out of a box, and not in the sense of on the machine pointing down. We can try to clarify that in the next version/update to the manual maybe with a diagram or picture with arrow to reduce confusion.
As side note I prefer using the right hand rule for knowing what way to twist a screw/nut/nozzle. Using you right hand, point your thumb in the direction you want the screw/nut/nozzle to go. For example to remove a nozzle form buda while it is on a printer this would be down towards the ground. Then curl your fingers into a fist leaving your thumb sticking out. The direction you fingers are curled in is the direction you need to twist the screw/nut/nozzle.
Please note this only work with the right hand. With the left hand things are backward and it get confusing which makes it pointless as a way to “remember” which way to turn screws.