OKREF wroteI'm giving the ball to white and the arrow to red.
If you're giving the ball to white because you decided that red had possession, the you set the arrow to white and change it when the AP throw-in is completed. Otherwise you will have the arrow pointing the wrong way if, for example, there is a foul before the throw-in. And you call both coaches over and explain the whole thing to them and the table so everyone understands...