Modern Vespa

I was browsing for a good quality switch cluster (or whatever it's called) for a VBB2 and stumbled on this.
What holds this to the headset? I thought at first it was incorporated to the headset. I changed out the shift tube a few weeks ago and would like to replace this thing so it matches the shift tube side.
Also, I know the following question should be in another post but any leads on a good switch cluster (or whatever that is called) ? I have problems with the kill button on the cheaper units.

If the perch is not broke, don't fix it. The reproductions are awful quality and getting them off without the proper tool is a challenge.

Noted....Thanks for the info, I will leave it alone.

It seems that replacement switches often need some tweaking to work right. I've used the ones from Mercado, rather than eBay/India and usually can get them working OK.

Your kill button simply grounds out the lead from your coil, make sure the switch HOUSING is well grounded or it will not work. You may need to bend the grounding contact tab under the kill button to ensure good contact with the kill wire connection post.

The last 2 I purchased were from SM.
It's a bit more mechanical rather than electrical. That small brass tab/strip does not hold up very well. Either I push it too far and the switch button wedges behind the cover or the shorting tab gets angled too far from the contact block from use and is hard to realign. I don't really know what is supposed to touch what at what angle.
I have a few I rotate through by re-bending the brass thing. Now the one I am using is super sensitive.
I hope it does not false trigger.