In Minibits:
Settings -> Nostr Wallet Connect -> Add Connection
Add a name to it like "Amethyst" and set the maximal daily limit
Click on Save and click on the button on the right, that will open a QR code, click on "Copy"

Go to Amethyst
Select any post and long press the zapping bolt ⚡
Go to Wallet Connect Service and click on paste.
https://image.nostr.build/a5ad19410d71dd1f36bcc490418eb2a0ee9bb2c2270232ab85cbda77565684d6.jpg
SAVE!

You are done, go zap yourself in your profile to test it

Best wishes