The OEM insert ( chrome look plastic ) served as a trim and also locked the gasket. I don't know what else one might use to lock the gasket. Depending on how much gasket and lock there is, the grafted stainless reveal might not attach to the correct clips placed in the correct height position.
Since the windshield frame could move, the molding could chip away at paint or make a noise, so maybe glueing it in place is the best plan.
