Left door, inside top pivot pin. Also need the guide in the top rail.
Paul from SWISCO responded:
October 31, 2023
Thanks for reaching out to us. It looks like you're showing the new style Float-A-Way bi-fold door. The top pivot pin will be the 21-024 and the pivot bracket is the 21-203. We also related the other pins on this page that the door also uses. Review the specifications and see what you think.