Elastic search connection needs ca.crt file

I try to connect with my lenses box to elastic search.
Normally I should specify on top of user/password also my ca.crt file

But I don’t see a way to configure this in the interface.

So the elastic connection fails with the error

javax.net.ssl.SSLHandshakeException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target