[eva2000]

thanks they must of changed the fan mounting process from that of what modfathers review explained

Seems I figured out how to mount them, I had to use the 10 screws and put then through the underside of the shroud first before mounting the shroud, then place fan on top over the protruding screws, then use the white nylon nut to firmly secure the fan to the shroud. I had to go to hardware store and get a 1/16" allen key (sooo small!) to use on those 10 screws.