Close the fridge door and open the freezer door. There's an air chute in the top of the freezer that will be coming out, along with the rear air chute. Remove the pair of screws on the top chute using the 1/4" hex socket. The back chute will still be holding the top chute in place.
If you're assisting, you may notice the ice dispenser is right next to the back of the person leaning into the fridge. Unless it's a very hot day, try not to slip ice cubes down the shirt/shorts of your cohort.