Can two magnetic rings act together on one axis?
The current flows back to the axle via the outer sides of the two magnetic disks. In different to the next video.
The current flows from one side of the axle to the edge of the disc and on the other side from the edge of the disc back to the axle.
There are several connection options for multiple experiments.
Conclusion
If the current flows through the two discs, then the two magnetic discs must be magnetically aligned in opposite directions (north-south/south-north), only then is rotation in the same direction possible. If the magnetic orientation is the same, the current must always flow from the outer edge to the axis or vice versa.