Switch out the drill bit for the 4" hole saw and drill a hole in the top of the barrel, toward the backside of it. The location of the hole should NOT be like the one in the picture. Mine was drilled in the center because a client wanted it that way. Ideally, the hole at the base should be at the front side of the barrel and the 4" hole in the top should be at the back of the top, as it will back up to your house. You should drill your hole toward the back side of the top so that when you place the barrel beside your house, the downspout will feed directly into it.