Today, I installed the staircases, which was surprisingly easy and presented no difficulties. The long staircase fit perfectly against the third floor stairwell and aligned with the second floor.
To simplify the process, I installed the components in the following order: the long third floor staircase, the staircase landing with cabinet, the short first floor staircase, and finally the medium second floor staircase.
Ensure that the staircase landing edges are flush against the left and back walls.
