Sony PCG-FX120K - Manual (Page 65)

Connecting the Port Replicator
65
1 Turn off your computer and disconnect all peripheral devices.
2 On the bottom of the computer, slide the port replicator connector cover
open.
3 Attach the bottom of the computer to the port replicator connector until it
clicks.
Port replicator connector
Attaching computer to port replicator
Port replicator connector
Notebook
Port replicator