To run the async service in sidecar mode as mentioned in Introduction, we will need to enable the sidecar in the deployment form. This is available in the advanced settings in the Deployment form.
We will have to provide the url in your service to which the sidecar can send the HTTP request. For e.g. if you have a path called /predict in your service and you are running it on port 8000, the destination url will be http://0.0.0.0:8000/predict

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Sidecar destination url should be http://0.0.0.0:<port>/<path>

The port number is the same as what you provided in the Ports section in the deployment form. The reason you have to provide it here again since you might have multiple ports and you want the sidecar to call one of the ports specified.