You have to go on the underside of the wing, make and incision about 4" long where the radius and ulna are and take the meat out. You would also have to take all the meat off the humerus bone as well, or even take the humerus bone completely out. If you look at the backside of a wing you can see where the meat is. It's not that hard but you need to make sure you don't cut into the feather area when taking the meat out. Hope that helps. Good luck,
TRKYHTR