Hi Nerwin,
Wish they would just give you a button. let the people choose haha.
What you could do is have a switch added in parallel to the seat switch. This way you could choose when you want it. If you want to avoid leaving it accidently in the disabled position you could use a push button with a relay and self holding via a contact. So safety is activated again every time you switch off the tractor. Another NC pushbutton could be added there to be able to enable/disable the safety switch on the fly. If you want I can draw you a wiring diagram.
When I got my (Micky-Mouse) "Tractor" (G1900) I first laughed about all those safety switches. But when I was driving it at full speed for the first time and turned the steering wheel quickly (4 wheel steering) I realised that it is fairly easy to be thrown off the seat and your tractor continuing the direction it was going until the fuel is out or until it hits an obstacle, whatever comes first.
So I decided to repair all the faulty and bridged safety switches and I would not disable them permanently.
Kind regards,
Hugo