First a warning:
Using SSH is at your own risk. If your actions result in your slot being inaccessible we can reset it for you, but we will not provide any other support. You will lose all your data once we do this. Using SSH is not recommended if you do not know what you are doing!

To begin with:
To connect to your slot you will need a terminal application on whatever operating system you are running on. Usually 'PuttY' will do just fine. Download and install the application of your choice, we will use PuTTy as an example in this guide, but you can use the information within any other application you might use.

Once SSH is enabled you can find the port number and full hostname on your boxes overview, by accessing the box you want to connect to.

Step 1:
Open PuTTy and input the details to your server in the appropriate fields:

Once that is done click on 'Open' and wait for the session to start. You will be presented with a pop-up to confirm the SSH-key.

Click 'Yes' to continue to step 2.

Step 2:
Once the connection has been established you will be need to input your username, followed by your password.

Input your username and hit enter. You will then be asked for your password, if you type you will not see any characters appear as a security measure. Be sure to type or copy your password correctly, then hit enter.

Step 3:
If all goes well then you will be presented with the following screen:

You can now use your SSH connection.