Understanding interaction between load balancer and 'web' endpoint on 9000

[ghost]

Hi. I am in example 4 and following along on the video. I understand that the Traefik helm deployment creates a default static http endpoint at port 9000. I also understand that we annotate a standard ingress with the traefik endpoint. The load balancer (cloud provisioned but triggered by Traefik) is taking traffic at an external IP address. What I don't understand is the flow from traffic hitting the load balancer at port 80 (if we curl or use a web browser) to the endpoint defined at tcp port 9000. In our example we simply curl (which I believe uses port 80). It hits the load balancer, but what connects it to the 'web' endpoint in our static configuration, and how does port 9000 come into play?