Intake gaskets small block

I really don't know the purpose of them, but it looks like they may be to help the rail gaskets stay in place, along with the pin in the middle of the front & rear rails. But I always broke them off and used silicone for the rails (front & rear of the intake). Cork gaskets often hold the intake up because they are too thick, especially if there was any milling and/or aftermarket intake is involved.