You have to first go to the ‘Point’ which @cjquijano has already created. Click ‘Show’ to make the point visible in viewer.
Next, go to rotational load. The rotational axis will be that point i.e. (0,0,0) and rotational axis will be positive x. So it will rotate around positive x-axis along the point (0,0,0).
I hope this clears the point. If not, feel free to ask.