Tighten the Spout Mounting Nut

What happens here

While your helper holds the spout steady from above, use the basin wrench to tighten the mounting nut underneath the sink. Turn the wrench handle clockwise to secure the nut. Tighten it until it is snug and the faucet base is stable and does not wobble. Check with your helper to ensure the spout did not move while tightening.

Goal: Secure the Faucet in Place