I understand your point of view.
I ask this question because on another forklift (Linde E30 series 336) we have installed simply a NC button on the pin 5 of 1X11 connector.
When you press this button (open the circuit on pin 5 of 1X11 connector) the forklift slowdown at the speed you desire, setted using the Linde software.
The same things we have done on STILL using a programmable output (reserve interrupters).

Do you know if something like that can be implemented on this YALE?

Thanks

Marco