How to connect to your server in a game:

1) Click Servers in the far left of your window.

2) Click Settings on the server you want to connect to.

3) Copy the IP address into your game and go!

After the IP address (12.345.678.90), there will be a port number (:01234), you will need this in the ports input, or if there isn't a ports box input your game, the whole address with the port will go in there (12.345.678.90:01234).