You are at the ground level looking East at the West face of the Castle.  You can just see, in the middle of the building, a large window into the 2nd floor.  To the top right, within the small SW tower you can see a small opening... that's not a window it the outside of the 'garderobe' or toilet.  Probably modern for its time you would have sat on a hole in a plank with the wind whistling up the opening beneath you. 

You can go left or right around the castle, you can't go back into the car park and you can't go forward as there is a lot of vegetation and a small brook... and here you are without your wellington boots.