The battery and the power adapter connector are the only things located at the rear panel:
The I/O connectors are mostly gathered on the left panel:
These are two USB ports, a D-Sub output for an external monitor, modem and LAN connectors, a FireWire port, a PCMCIA slot. The PCMCIA seems to be of the rare “two-storied” variety called “Type 3”:
But it is in fact an ordinary PCMCIA Type 2 slot – the bottom “storey” alone is in use.
The DVD/CD-RW drive and the audio connectors were put on the right panel:
A nice little feature is that the interface connectors are all labeled on top, so you don’t have to look at the side panels to attach a peripheral.