The Key is hidden under the dell logo on the front of the computer push in on the logo and it is a small door with the key.
That would be very cool (and handy), but I'm not sure we're talking about the same machines here. Once I started bending the metal on the logo, I took the front bezel off and that's all it is, a logo. I took it off to bend the metal back out, so I'm sure there's no key under there.
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Matt