Connection to remote cluster is failing

[sandy2428 (sandy)]

Hello

I am trying to setup ES cross cluster search but it is failing . Steps I did to follow

1. I have 2 ES clusters(running as kubernetes clusters) say ES-cluster1 and ES-cluster2 in 2 separate AWS accounts.
   2)I have one kibana pod running in as same k8s ES-cluster1 .
   3)Now I want to configure ES-cluster2(as remote cluster) for Es-cluster1(local cluster)
   4)From kibana console -> Dev tools ,I am trying to follow the steps at https://www.elastic.co/guide/en/elasticsearch/reference/6.7/modules-remote-clusters.html
   and run the below command but it is showing as not connected for ES-cluster2 which is elasticsearch-ops in this case.

Any help is highly appreciated.