If you want to open a SSH connection in Mac OS X you might use Terminal to do so.
In Spotlight write terminal
Start the application.
Once the terminal window is open, press the following combination: Shift + Apple (cmd) + K
Then another window opens and you can select SSH in the left menu. In the right menu you can enter the server address by clicking the + symbol. Now just enter your username for the server in the user field.
Select the Protocol you want and click connect. The connection to your server will be established.