CalDigit RAID Card - Manual (Page 42)

42 A. MacPro
Fan module
1.12 Installing the fan module
If you are using a Power Mac G5, please skip to step 3.15. Install the fan
module back insdie the chassis. Make sure the cabling is clear of the fan
modules mounting arm and then tighten the screws.
(One screw for the 4 Core MacPro at the upper-right rear corner. Two
screws for the 8 Core MacPro, one at the upper-right rear corner and a
second at the lower-right front corner and take out the fan module).
1.13 Install the CPU cover
(a) (4 Core MacPro) Install the CPU cover by inserting the top-left edge of
the cover under the retainer on the fan module just below PCI card
support (slot 1) and then rotate the cover into place. Slide in the
memory cards and tighten the two long screws from the back of the
DIMM cage and the two short screws on the bottom front edge of the
DIMM cage.