There is no direct correlation between the manager and support page, but you can still do it.
On the support page, select licenses and then the link for the license you want to check.
Copy the "creation time" value and paste it into an epoch time converter: http://www.epochconverter.com/
On Manager Licenses, select License Details, and match the human readable creation date.
It is very unlikely that you will have two with the same creation date and time.
