AT&T Merlin II Feature Module 2 Installation Ans Getting Started Manual page 22

Make sure the expansion slot is clear. Position the colored wires crossing
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the slot so they lie beneath the card as you install it.
Holding the CMS expansion card by its top corner edges, lower the card
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into the expansion slot receptacle you have chosen (Figure 6). Do not try
to insert the card through the back of the unit.
Position the card so the electrical contacts, the gold "fingers," are aligned
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with the receptacle in the expansion slot and the back edge of the card fits
into the groove on the plastic guide.
FIGURE 6 Lowering the CMS expansion card into the receptacle.
P l a s t i c
g u i d e s
Gold "fingers"
Receptacle
Step 3: Installing Your Hardware 17