Place the top one 25 mm to the left and right of the bench. The lower bench, measuring 185 mm x 60 mm, must be fixed at the same height as the bottom of wall beam no. 4. The top of the upper bench, which also measures 185 mm x 60 mm, should be at the same height as the top of wall beam no. 6. Use the screws 5 x 60 mm. CapqIOR.