Bench Seat Brackets

[GEARBOXGARAGE]

I'm in the process of reassembling the bench seat mounting brackets after being torn down and set aside for several years. I'm not sure if I have a missing part or if the fitment of the pieces were worn more than I remember. The issue is in the pull rod that connects from the LH to RH bracket for seat position adjustment, where it attaches on the LH bracket. The fitment is not very good and slips off of the pull pin. Am I missing something or is it just worn out and needs a little modifying to get it to stay in place?