Looks identical to my SHU43. Two screws at the bottom of the tub, you may need a torx driver, same size as the screws on the inside of the door.. The arm seems to flex away from the top of the DW so is not connected there. Be gentle. Look at the bracket mid level at back when your baskets are pulled out. It may be connected to the back wall by hidden screws or a clamp where the three "knobs" are on the arm.