Your timing is good, HOWEVER you must know that you are not guaranteed a seat by the window.
If you are not by a window you will NOT be able to see them.
You will hear the music though, as they pipe it in to the restaurant.
Since your ressie is 8:55 your chance of getting a window seat will be slimmer as most people wanting to see Wishes will make their adrs for about 8:30 to ensure they are about done with dinner and can enjoy them.
It is about a 20-40% chance you will get one. Not impossible, but don't count on it.
With your time that close to Wishes time, you can't really say you will wait for a table window side....of course you could just take your chance on if you will be seated or not.
Good luck!