Hello,
There are many ways to do this.
Try this one
UniServerModule -> CustomFiles:
http://assets.freshdesk.com/widget/freshwidget.js
MainForm -> Script:
FreshWidget.init("", {"queryString": "&widgetType=popup", "utf8": "✓", "widgetType": "popup", "buttonType": "text", "buttonText": "Support", "buttonColor": "white", "buttonBg": "#006063", "alignment": "1", "offset": "100px", "formHeight": "500px", "url": "https://adm-concept.freshdesk.com"} );