Two possible ways to attempt this:
A) Watch Illumations from the side closest the Epcot exit and after it finishes RUN and try to catch the monorial to TTC. At the very least, maybe you'd be able to see wishes from the monorail you would transfer to at TTC
If you have a car that day,the only way I would even attempt this would be to
1) go to dinner at the beach club and park there
2) exit after illuminations through the international gateway and walk to beach club and get in your car and drive to the contemporary and go up the bar at the california grill and have a drink and watch wishes from there.