Hi trippyrez (and welcome to the forum!)
It sounds as though you need a 3.5mm minijack to 5pin DIN cable to connect your laptop to your Beosound 2000/Century, as most laptops have 3.5mm "headphone sockets" fitted. You can find these via my sponsor link below, marked as "iPod to B&O Cables".
For future reference, the Aux socket on your BeoSound is an input socket only, not a combined input/output socket as on most other B&O systems. Hence, you are fine to play back other music sources through the BeoSounds, but you won't be able to record from the B&O system to another device.
Kind regards,
Steve.
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