Forward unto dawn Internet unlock

I recently received Halo 4 limited edition with the special unlock of Forward unto dawn. I managed to unlock it on both my xbox and on the console version of waypoint but I can’t seem to find out how to unlock it on the Web version of waypoint. I followed the instructions but I can’t find the halo 4 Intel button to be able to unlock it. Can someone please help?

If I am not mistaken, it is a reward for avatar.