Mitel 3300 Technician's Handbook page 203

To install the APC hard drive in a CX/CXi:
1. Unplug the ribbon cable and the power cable from the old hard drive.
2. Remove the screws connecting the bracket to the back of the
controller, then slide the bracket forward and remove it.
3. If a system hard drive is already installed in the upper bracket position,
unscrew it from the bracket and move it to the lower bracket position.
The power and IDE cables can remain connected.
4. Lower the APC hard drive into the upper bracket position. Ensure that
the hard drive jumpers are set to master.
5. Secure the hard drives to the bracket with the screws provided.
6. Connect the power and IDE cables to the corresponding connectors
on the hard drive and main board. The cables are keyed for proper
connection (see Figure 59).
Tip: Connect the System hard drive IDE cable to the main board connector
labeled MPC8270 HARDDRIVE. Connect the APC hard drive IDE cable to
the main board connector labeled ETX HARDDRIVE.
7. Slide the bracket back into the chassis, then fasten the screws
connecting the bracket to the back of the controller.
Figure 59: Connecting cables to APC-CX(i)
Install and Replace Units
193