As Preach quoted above, the best option is to send it to the email provided. But, as y'er screenshot provided, it seems ye missed the registration time by just a couple minutes. Registration usually closes on the hour, so ye got to send it b'fore the hour is up or else 'twon't work. Ye will probably 'ave to wait 'till registration opens up 'gain to use the activation link.
Sorry that ye missed it, deary! Better luck next time!