[Kube]

I just solved my own problem.
The short legs go on the driver seat (adjustable) and are taller than the right seat because there is a track on the left seat.
When the seats are installed, they will be at the same overall height.
The "female" / "male" variation? So, they can't be interchanged.
My excuse is the fact I am German, have a background in mechanical engineering and tool making so of course I over thought this.
The real reason may be ignorance, but I prefer my first inclination.