Hi Frederick, I don't think there is any method set up in the node editor to pick a point with the mouse like you would in a regular MoI drawing command.
You would probably need to create a point object using Draw curve > More > Pt and then feed in that point object.
I am unsure what kind of interface with nodeeditor would work...
I suppose the rotation axis (Frame) would depend upon the active view? Top, Front, or Right. (or 3D?)
What sort of widget node would permit mouse input to a .nod file?
preselect the point object in moi and create a new point in the node editor with points2\Point. This node will take the coordinates of the selected point object. To see the point you can connect a point in NE with Info\showFrame.