How to add a link under quick launch using custom actions?

http://msdn.microsoft.com/en-us/library/office/bb802730(v=office.15).aspx

Custom actions allow us to create feature to add a link under site settings, site actions menu and even central admin.

 Is there any way we can extend this feature to allow links being added under quick launch? I tried providing location Microsft.SharePoint.Navigation but that had no effect