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I assume you are talking about the metal plate/bracket part that needs to go on to the handle then into the slot. If you look closely, that plate has a tiny tooth that sticks out on the bottom, this part is actually tricky too. You have to put the plate in at an angle so that it will go in with the handle leg together into that slot. The slot width is small so sometimes you might not be able to get them in so just try at different angles.