Will upload pics shortly. What I am trying to do is remove the top panel that has the cross beams for rigidity. I need to do this so that I can: mount the fans and radiator to the tray, slide that in then replace the beam panel and sandwich it all together. I could drill holes where the screws will go for the fans as when they are mounted under the beam panel, the holes are not accessible.
I have seen a few others in the top cavity post that did exactly what I am trying to do, however none disclosed exactly how it is done.
Here is an Imgur album of the current situation.