Just as an aside fellow M3Wheelers.
I display my disc in an "Oxford" stainless holder with a gasket (They make stuff for bikers) that uses one of the passenger side allen bolts to secure to the dashboard. I am not sure of the legality as if parked up with tonneau on will those lovely folk who warden the traffic get a bit upset? Is it the law to display a disc?

2022 Plus Four, 2023 Super Three, Range Rover Vogue SDV8 and Triking T3.