Sony PCG-XG19 - Manual (Page 63)

Connecting the Mini Docking Station 51
To connect the Mini Docking Station to your computer
Connect the Mini Docking Station to the docking/FDD connector on the
back of your computer.
When a charged battery is inserted in your computer, you can attach and
detach the Mini Docking Station without turning off the computer.
1
Open the cover of your computer.
2
Attach the left side tab of the Mini Docking Station to the left side
hollow of your computer.
Push the tab into the hollow firmly until it clicks.
Docking/FDD connector