Thank you for the answer, but the difference between the switch and button function is completely clear to me, I have no error in this, I just try all the variants.
The result is always the same.
a- When I set and use it as a button, the steering never stays stably on,
b- when I set and use it as a switch, the steering also keeps turning on and off.
Only after switching on the icon on the screen does the steering remain permanently active and the tractor steers perfectly.
An interesting finding is also that if I set “external enable - NONE” I still see attempts to activate the steering after connecting pin no. 8 of the ampseal connector to GND.