Mitel 3300 ICP Hardware User's Manual page 220

3300 ICP Hardware User Guide
100 User Controller
To remove and replace the System ID Module in the 100 User Controller:
1. Remove the cover.
2. Remove the module from the board. The module is located behind Slot 2.
3. Replace the module behind Slot 2.
4. Replace the cover.
212 Release 3.3