That factory plug is worth its weight in gold. If you ever want to sell the car, the next owner will want a working radio. Instead, buy a for $10. It plugs between the car's Ford plug and a standard aftermarket radio.
Note: Ford loves "Light Green." It appears on four different circuits. A magnifying glass and good lighting are not optional—they are mandatory. Here is the most interesting part of the 6000CD. Unlike old-school radios that just need power and ground, the 6000CD often listens to the CAN bus network (two twisted wires: Purple/Orange and Blue/Orange on the smaller 8-pin plug). Ford 6000cd Wiring Colours
Why? Because Ford decided the radio should turn on via a data signal from the instrument cluster, not a simple 12V ignition wire. If you pull a 6000CD from a scrapped Mondeo and put it in a Fiesta, it might show "DISABLED" or "NO CAN." That factory plug is worth its weight in gold