You obviously don't have a 900. The fans mount into a shroud which mounts to the hard drive cage, which then mounts to the frame.
Actually, a picture is worth 1000 or so words:
See?
Anyway, leak testing underway. 2 leaks from improperly seated barb o-rings, one at the res, the other on the rad. Sigh. 1 Hour and 2 new pieces of tubing later, no immediate leaks. So, let's make bubbles!
Hopefully, the loop will get transferred to the final resting place Sunday.