How can I get Elastic IP/host from KIbana interface
Kibana always connects to the elastic host that is mentioned within kibana.yml file that been used during installation/configuration (example value within file as follows):

elasticsearch.hosts: ["http://localhost:9200"]


In case if it configure to points to multiple elastic nodes for high availability of kibana (as follows). Requests to available hosts will be routed in a round robin fashion (top to the bottom of a list and then starting again)

elasticsearch.hosts: 
 - http://es-host1:9200
 - http://es-host2:9200


To know available nodes, you may use nodes API from Kibana - Dev tools

GET /_nodes

# or Use following
GET /_cat/nodes?v