Where's the Lenovo Care Button

Hi,

I recently bought a [rfdlink=106]Lenovo[/rfdlink] SL400. Now, I need to access the bios but to access the bios I need to press the [rfdlink=106]Lenovo[/rfdlink] Care Button. The problem is that I don't even know where this button is?

Could somebody help me.
Thank you
Frank