That connection has been written about including KSM’s financing & relationship with Saddam's intelligence via the Baluch.
If you haven't read Doctor Laurie Mylroie’s article titled “How Little We Know,” The American Spectator, October 2006
check it out at http://www.lauriemylroie.com/
Actually, she has a book, which I’ve been meaning to read. Gerald Posner, in “While America Slept,” mentions in a footnote that to many people, the Iraqi/Arab terrorist connections to OK City are still not conclusively ruled out.