I'll add a few details about the .qwc file, Arul Pushpam.
The .qwc file is an XML file which is provided by your third-party web-service. We're unable to provide you with any steps on how to create it since each web-service has different ways in creating that specific file. We can only walk you through on how to add the application to the web connector.
If you have more questions, we're just a comment away.
