Question about Feller EDIZIOdue Smart Light Control for Philips Hue

Hello all, I would like to install the EDIZIOdue Smart Light Control as a replacement for an old flush-mounted Feller Beamit push-button (also Edizio Due system). Which mounting accessories do I need for this: A Feller "Art. 22724408 Dummy cover UP without centre screw or " Art. 21468718 Device mounting Feller Smart Light Control Switch". Many thanks