The integration uses the ICal standard format for most calendar programs.
To access the link, open Settings
This will open up the Settings Screen:
Within the screen, right click on Other Settings
Then scroll down to Get calendar feed link
This will open up a small menu, copy link address:
Copy link address.
Open Google Calendar
Go to Other Calendars and select from the drop down Add by URL
This will open the Add by URL box.
Paste the URL and select Add Calendar
This will successful add the calendar to Google.