Dell OptiPlex XE3 Tower Service Manual page 62

4. Align the cables with the pins on connectors on the system board and connect the following cables to the system board:
5. Route all the cables through the routing clips.
a. power distribution for optical drive and hard drives [1]
b. PSU [2]
c. speaker cable [3]
d. SATA data cable for optical dive and hard drive cables (4 cables) [4]
e. PSU cable [5]
62 Disassembly and reassembly