Apple Power Mac G5 (Late 2004) - Manual (Page 50)

50 Chapter 3 Working Inside Your Computer
6 Replace the front fan assembly by firmly pushing it back into the computer by the
handle until it connects.
Important: Make sure the fan assembly engages the connector or your computer will
not operate properly. Gently pull the fan assembly to see if it is properly connected. If it
resists and stays in place, it is connected.
Slide the plastic rail on the fan assembly
into the cutout in the sheet metal divider
inside the computer. The fan assembly
needs to engage this connector.