Rails mongoid connection to remote cluster

I am trying to make a rails 4 application with mongodb (skipping active record). I created a cluster on https://cloud.mongodb.com, which has three hosts. The cluster is accessible in the Mongo Shell, how can I access it in rails mongoid.yml.

mongodb://sommer:DYazhDSxwgWWvD00@cluster0-shard-00-00-i1dxi.mongodb.net:27017,cluster0-shard-00-01-i1dxi.mongodb.net:27017,cluster0-shard-00-02-i1dxi.mongodb.net:27017/test?ssl=true&replicaSet=Cluster0-shard-0&authSource=admin

this is where i created the cluster and it is public.