For the benefit of those who will travel this road eventually, here is how I did mine.
I removed the screw and nut and inserted a knife with just enough force to open the grip placed on the governor control rod protruding from the engine, now I will insert a thin piece of metal in this pressure slit or whatever it is called and put the screw and nut back on and tighten.
It doesn't matter if the little rod turns now, there is nothing holding it.
Now I will use the arm for the throttle control, I will addsomething to connect the cable directly to the arm using one of the available little holes already drilled.
What do you guys think?
edit: added one more pic, the only think I could find in a hurry.