Connect to a POSTGRES database using a .pem file (SSH Tunnel -RSA Private Key)

I need to connect to a POSTGRESQL database that has an SSH tunnel to be authenticated!

I received the .pem file with the RSA PRIVATE KEY, however I don’t know exactly how to set this up in the “POSTGRESQL CONNECTOR” node. I saw some topics here in the forum referring to JDBC PARAMETERS, however, I was not successful!!

Tks