I have my kube config file and inside cluster information is defined.

- cluster:
    certificate-authority-data: some-base64-data
    server: https://my-server-url

From where in configuration can I change this server. I have a master and 3 workers. I'm using Route53 for domains and routing via Ingress and a Load Balancer. I have a record set(server-url) pointing towards the public IP of master instance.