I need pass one kibana nginx header name(testHeader1) to elasticsearch proxy. Now i use requestHeadersWhitelist which including "testHeader1" ,but it does not word

i need pass one kibana nginx header name(testHeader1) to elasticsearch proxy.

Now i use requestHeadersWhitelist which including "testHeader1" ,but it does not word.

kibana version:6.8.0

can you explain more your setup? just to make sure we understand it right.
You have a kibana instance on a machine and an Elastic instance on another one with a proxy in front. And you want Kibana's requests to Elasticsearch to contain an extra header for that proxy?