How should specify "Cluster endpoint" when I want to deploy a process in self managed web modeler

Hello,

I deployed a Camunda 8 self managed free following Camunda 8 Helm installation | Camunda 8 Docs on our K8s cluster.

After I created a test process on Web Modeler (also self-managed, port-forward to k8s cluster following doc), how should I specify Cluster endpoint when I want to deploy it? I tried http://localhost:26500 ( I have port-forward zeebe gateway with command kubectl port-forward svc/camunda-zeebe-gateway 26500:26500 -n camunda), but I got “Cannot connect to Zeebe cluster”, from deverlop tools I saw “{“data”:{“status”:“UNAVAILABLE”,“message”:“io exception”}}”.

Thanks.