AppleCare Pro Video Support Agreement: How to find the enrollment number
If you are trying to enroll or register your recently-purchased AppleCare Professional Video Support Agreement, you will need to reference your enrollment (registration) number. (For other types of AppleCare agreements, look here.)
Inside your AppleCare Professional Video Support Agreement box or envelope you will find a booklet that says "Getting Started" at the top. In the bottom-right corner you will find your AppleCare Professional Video Support Agreement registration number.

Once you have located your registration or enrollment number, you can activate your coverage here.