Does it bother anyone else that the mouse is coming out of the left side of the keyboard? Did they actually configure keyboards like that at any point?
The whole interface was so alien back then it didn't really matter. It was going to feel weird no matter what. It's only after several decades and a generation that it's started to feel like there's a "natural" configuration.
Yup, I might be misremembering, but there were at least a couple Sun Solaris keyboards with PS/2 style connectors on the left. Maybe some old Apple ones as well.
This art actually looks like it's based on an Apple Extended Keyboard II. It's been a really long time, but if I remember correctly, those had ADB ports for the mouse on both the right and left side of the keyboard (you could use either, or possible both for other ADB devices).