for those who haven'tbeen to shannon's before here is a map.
if you're coming from the lane cove tunnel or from the harbour bridge , you can take the reserve rd exit (turn right from the west, left from the east) and follo until you get to the roundabout, the entrance to shannons is just past the roundabout.
Be Aware though, the driveway isn't lowered car friendly, but if you're careful you can get in without scraping.