Top CenterThe board is clearly labeled. You can see where all of the interface connectors are across the top. The upper left port is for an external disk drive. Below that, you can see where the floppy cable for the internal drive connects.
Next to that is the composite video out port.
Further to the right, is the connector for a television if you wanted to use that rather than a composite monitor.
Next there's a 9 pin DIN plug for an external modem.
Finally, there is a standard 9-pin port in the upper right for the AppleMouse IIc.