the Argument of Periapsisafjkl or watever.
is just which way the ellipse is pointing.
ehh, i'll try an analogy.
If the outer edge of a 2-dimensional egg is the orbit of an object, then the Argument of Peri is which way the eggs is pointing.
the longitude of the ascending node (or just node)
is which way the plane is pointing. (i think)
ehhh, just stare at this diagram for a couple hours