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.

SAVE!

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

Best wishes