Mounting this closure is really a snap!
Drill a 15/64" or 6mm hole in the lid or door and glue in the turned brass button. Close the lid or door, and the small point on the button will mark the drill center on the opposing piece.
Drill a matching hole, glue the plastic insert in place, and the closure is ready to go. The bulb on the brass button is trapped by the insert, holding the lid or door securely closed.