IBM 2104 Model DU3 - Manual (Page 45)

Connecting the 2104 Model DU3 to the Power Source
1. Refer to Figure 22.
2. At the back of the 2104, plug a power cable into the mainline power connector
1 on each fan-and-power-supply assembly.
Attention: Never use power cables from another drawer to connect a
2104 to the mainline power outlet. Use only the shielded power cables
that are supplied with the 2104.
Figure 22. Connecting the Power Plugs
Installing a 2104 Model DU3 29