Could someone please tell me where to enter the Pre-order key

I must be missing something obvious. I've read the comments below but I've seen no specific step by step. I really have been unable to find where to enter Preorder Key - NOT UPLAY.

If someone could provide a step by step for where this key should go, I'd very much appreciate it.

@Everyone - We're looking into some people not getting the pre-order codes.

@Geminireaper - You don't get an extra code for that, it's at the rewards vendor when you get your base.

Did not recieve my 3rd key for national guard gear set

Nevermind I'm stupid. Found everything. For those not finding the pre order bonuses: you need to go to the reward claim vendor in your base of operation (under the tech wing).

I activated my Gold Edition 4/3 but I can't find my preorder bonuses. Suggestions?

Got the gold and season pass keys. I guess I was late for the pre-order bonus key, that's too bad. Great service, guys. Keep the good work!