Questions to ask yourself before you start:
What positioning do we want ?
A cylindrical recess with axial immobilization ("pivot" joint).
What constraint tool can we use ?
Pre-position the axle instances using the move tool
Select in the tree the constraint element of a bearing (defined in the preparation phase) corresponding to the entry circle of the bearing, then while holding down the Ctrl key, select in the tree the constraint element of the first instance of axle corresponding to the end circle of the axis, then apply
Proceed in the same way with the second instance of axle in order to force it to enter the corresponding bearing.
A recap video will be available at the end of this cycle.