Inside The System - Dell EMC NX430 System Owner's Manual

Steps
1 Align the slots on the system cover with the tabs on the chassis.
2 Push the system cover latch down to move the system cover into the closed position.
The system cover slides forward and the tabs on the system cover engage with the slots on the chassis. The system cover latch locks
into place when the system cover engages with the slots on the chassis.
3 Rotate the latch release lock clockwise to the locked position.
Next steps
1 If removed, install the bezel.
2 Reconnect the peripherals and connect the system to the electrical outlet.
3 Turn on the system, including any attached peripherals.

Inside the system

Figure 10. Inside the system—with four 3.5-inch hot swappable hard drives
1 hard drive backplane
3 power supply unit (2)
48 Installing and removing system components
2 power interposer board
4 expansion card riser