I purchased a boxed copy of SR2020 - where is the CD Key located?

I purchased a boxed copy of SR2020 - where is the CD Key located?

For the original SR2020, in North American versions the CD-Key is located on the back of the manual. In most other versions the CD-Key is printed on the CD Disc itself.

For the Gold Edition, the CD-Key is printed on an insert page in the CD case.