You’ll find him back in the racket’s hideout that you’ve cleared before. Even with three enforcers killed, the place will still be filled with guards so performing stealth kills is still recommended here. There are many point of entry in this place and each time you can deal with the guards in your own way. Like before, having silenced weapons will make your life a lot easier. You don’t need to clear the entire place; you just have to reach the game room and wait. Harry will kill one of his men during the conversation which is one less problem for you. You can then ambush the last guard with him as he roams around then move in to take Harry by surprise and make him submit without resistance.