When you link your help desk provider, it will live inside your HelpShelf widget, via an easy to find Contact button.
When your users need to reach you, they'll be greeted with the exact same chat or support interface provided by the help desk provider you linked.
With the contact button neatly placed inside your sparkly new HelpShelf widget, you'll be maximising the chances that your users will discover the product and help content they actually need - reducing the overall support requests submitted.
Your users will love you all the more for it :)