Quarter Panel Pillar Seal

Quick question. Got some new quarter panel pillar seals for my 1965 Dart GT. Old seal has three screws that hold it in place. New seal only has one exposed hole and two holes that are covered up. Did find seals from another supplier that has three holes. Do not know which are correct as the old seals were replaced before I got car. Can someone tell me if three screws are to be used or only one screw?