Dell OpriPlex XE3 Service Manual page 65

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]
Disassembly and reassembly 65