These things are on the left panel of the notebook:

• An RJ-45 network connector;
• An RJ-11 modem connector;
• A DVD-RW drive;
• A Kensington lock.

The right panel carries the following:

• A power connector;
• A D-Sub connector for an external monitor;
• Three USB ports;
• An MS and MS Pro card-reader (under a cute small curtain);
• A FireWire port;
• A PC Card slot for one card of type I or II.

The battery cell connector is on the real panel.

At the bottom of the Sony VAIO VGN-FS115ZR you can see the cover of the memory and hard drive cells, a battery cell, a connector for a dock station or port-replicator, and vent holes. So, the upgrade opportunities are rather limited here.