Hi, mir.
I think you could create a work plan between the two flat walls of the asola and then bind the axis of the pin to the floor.
if you want the pin not to exit the asola select the components and with the right mouse click active "contact group".
then go to "analyze" and click on "active contact resolver".
at this point the pin should move freely only inside saddle'asola.
the contact group works but need many resources.
I found a solution that is simpler and more effective at the same time.
you can bind the pin axis to the first axis of the axle radius with the limit from 0 to the max distance between axles of the axle , repeat the game for the axis of the second ray of the axle .
Finally, to bind or the average plan of the two processes or tangency and everything works even if between asola and perno c is an offset .
I hope I've been clear