I am not sure why you can’t upload photos normally – I’ll send a message to Multicare.
I just dug out an old BL5000 keyboard (actually one that Beoworld member Leslie sent me many years ago) and prised out the metal circle with a guitar plectrum. It came out quite easily, but looks like it was originally glued in place:
Location: Warwickshire, UK
My B&O Icons:
