The three contributions can now be reproduced.
For the orbital contribution:
The orbit of the ball around the magnet would cause this contribution, as already mentioned.
For the spin dipolar contribution:
This time, put the magnet on the outside and the ball on the inside of the carrousel. The magnetic field of the electron reaches the inside of the carrousel, which can be demonstrated with the magnetometer.
Finally, the Fermi contact contribution:
Bring both objects into the center of the carrousel. This changes the configurational energy substantially, but remember only a part of electrons actually are very close to the center.