Here's a kit, with the silicone missing: You also need a coin.
WHat you do is put the screws through the bit of placcy with the hole in shove the screws through the china - which has a funnel-shaped entry to the hole, and do the screws up.
That distorts the placcy bit with the hole in, so the cap doesn't shut.
So you back off the screw a bit so the cap fits,
but that means the fixing isn't tight.
So you react, needing to put the coin in the swear-box.
Then decide whether you're going to use just the top half of the decorative placcy thing, or both halves maybe after you've made the hole big enough to go OVER the screw head.
And you stick it on with a smoothed dob of the silicone.
C'mon, we've all been there.