I recently purchased a Lowrance C-Map Precision HD Tennessee mapping card. The case the card came in reads that a free 1-year subscription to C-Map Genesis comes with the purchase of the card. The card did not come with any instructions regarding how to take advantage of the free subscription offer. I currently have a C-Map Genesis subscription that is valid through February 2021. When I log onto my C-Map Genesis account, I see no option that I can click on to take advantage of the free offer.

Here's my question: As a current C-Map Genesis subscriber; What can I do to be able to take advantage of the 1 year free subscription to C-Map Genesis?