Do you see the picture in the walkthrough? Stand there. No other location works. If, for some reason, the cat seems to be ahead of where you want it to be, just stand there and be patient. The cat goes through a routine, and will cycle back around again. Wait for it, until it sits behind the two crates, then steps out and sits to groom for a moment. Have the Green Scarf in your hand so you are ready.
That will be ten Dramoi.