You should know that I'm a long time Judoka and study C&E and a smidge of CaCC as well. I teach Judo (an "assistant instructor" in my view) at the local Y under 7th Dan, Bob Spraley. Did you think I republished all of those old CaCC manuals because I like looking at B&W pics of men in speedos?
No. I was actually "assuming" that both top and bottom position are grapplers. You don't get good side-control by accident. And north-south is a non-intuitive control position to take.
Which is exactly what I wrote.
I think you must have gotten confused. What I wrote is the guy on the bottom position of a north-south or a side-control is going to have a hard time doing effective knee-strikes because his body movement is being smothered by the top man and because the position of the top man doesn't present effective targets for the bottom man to throw knees at. Conversely, the top man is in a very good position to throw knees at the bottom man because he can shift his body and get some full-body movement into it, including, if desired, momentarily disengage from the bottom man in order to really get some body english into the knee strike.
One of us needs to re-read what I wrote because either you misunderstood what I wrote or I did a really terrible job of writing it the first time.
Peace favor your sword,
Kirk