The screenshot shows the traffic going through 3 Tor relays (which your browser knows the public IP addresses of, since it created that circuit in the first pla

The screenshot shows the traffic going through 3 Tor relays (which your browser knows the public IP addresses of, since it created that circuit in the first place) followed by three more Tor relays (which it doesn't know the public IP addresses of, since that circuit was created by the hidden service), followed by a final hop to the hidden service.