Dimensioning/positioning window size in the stairwell - tips?

Hello,
we are planning a stairway with a landing in our single-family house, with a window above the landing to bring light into the corridors. Unfortunately, the window faces the covered passage between the house and the garage. How should the window be best sized/positioned to get as much light as possible?

Thank you and best regards!
Andreas

We also have a staircase with a landing, to which we added a 2x2m window. We imagine it will look great from the inside and there should be more than enough light coming in.