Connect Apple Cinema display to Macbook Air 2012?

applemaz

Registered
I own an old 2004 Apple Cinema Display 20" (Aluminium) M9177LL/A and just bought a 2012 Macbook Air. When I'm at home, I'd like to connect the Cinema Display to my closed Macbook Air, but don't know what adapter to buy. The old Apple Cinema Display has an unusual connector.

Any idea what I need to buy?
 
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