Sony PCG-F520 - Manuel (Page 52)

Notebook User Guide "
To attach your computer to the port replicator
To supply power to your computer while it is connected to the port replicator,
you can connect the AC adapter directly to the port replicator.
 Turn off your computer and disconnect all peripherals.
 On the bottom of the computer, slide the port replicator connector cover
open.
 Attach the bottom of the computer to the port replicator connector until it
clicks.
When attaching your computer to the port replicator, do not attempt to insert or
remove the battery pack. Lifting and turning the computer with an attached port
replicator could cause a temporary loss of power.
Port replicator connector
Notebook
Port replicator