How do I know if my Koala global config is working?

I've tried putting an API config property in both config/application.rb and config/initializers/koala.rb

    Koala.config.api_version = "v2.2" 

How can i tell if it's using v2.2? the POST url isn't giving me any clues and the logs are giving any post params (i'm using put_connections so I don't think i can control that)