Panasonic KX-NS1000 - 2.7.5 Walking COS

2. Position the card in the open slot, making sure that the tabs on the both sides of the card fit into place.
Then,
holding the card firmly in place, lower the rear end so that the holes of the card are aligned with the
screw holes.
124 Installation Manual
4.2.5 Installing/Removing the Optional Service Cards