Haven't you ever seen those converters with a wire connected to them for like CD players and what not for cars? It's the exact same idea, just with an MP3 player intergrated.
The center/top actually looks about like the part of a tape player that reads the tape.
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Desktop * Athlon X2 4200 | 2G RAM | 160G HD | 7600GT
Laptop1 * C2D T5550 | 3G RAM | 120G HD | Intel x3100
Laptop2 * C2D T5250 | 2G RAM | 160G HD | Intel x3100
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