NEC IP4WW-12TXH-B-TEL(BK) - Figure 2-58 Plastic Knockouts; Figure 2-59 Replacing the Main-Cover

7. Cut and remove the Plastic Knockouts as required for each Expansion interface card.
Main-Cover
Plastic
Knockouts
EXP.1st PCB
EXP.2nd PCB
Figure 2-58 Plastic Knockouts
8. Replace the Main-Cover and fasten two screws.
Two screws
Hooks
Main-Cover
Figure 2-59 Replacing the Main-Cover
ISSUE 4.1 (R5.1) SL1100
Hardware Manual 2-39