How to connect to a TLS enabled mongodb server

[ivailoyanakiev]

I want to connect mongodb_exporter and local mnogodb server "version": "7.0.14"
TLS is enabled and I have PAM file and CA file.
I can connect to a Mongo DB with mongosh
I have a valid certificate for Mongodb server. But I do not have client certificate for a host
Before on old version of Mongodb I was able to connect using : ?tls=true&tlsInsecure=true but now it fails

[ivailoyanakiev]

ok this was strange and I was confused
The only why to worked for me was tls=true&tlsCAFile=/home/mongodb/$host.ca&tlsCertificateKeyFile=/home/mongodb/$host.pem&tlsKeyFile=/home/mongodb/$host.pem&tlsInsecure=true
Using PEM file on both tlsCertificateKeyFile and tlsCertificateKeyFile
If I have my certificate and key on different files it will not work.
It will be really useful to have examples and documentation of how TLS works.