Yeah, I'm referring to the white ball on the dash in front of Sulu.
...OTOH, doesn't Uhura also have some sort of a smaller ball under her right hand in the first screencap provided, at the extreme bottom edge of the picture? Or is it just a particularly brightly glowing area of the flat panel?
The Ferengi shuttles were evidently controlled by domes similar to the ones on the ST6 starship helm consoles - they were rubbed by one or two hands, rather than physically twisted or pulled or rotated. An extremely clever parallel to our phallic joysticks here, demonstrating the priorities the Ferengi give to their various erogenic areas.