You might want to start with our detailed tutorial for your first steps with MongoDB in DSS.

Setting up the MongoDB connection

Use the Connection URI option:

mongodb://<USERNAME>:<PASSWORD>@<SHARD HOST>:<PORT (Mongo default = 27017)>/<DATABASENAME>?ssl=true&authSource=admin

As a reminder, be sure to set your connection Details readable by a particular group, or all analysts, to ensure access is allowed.