Here are the instructions we received from Wargaming to help you build the activation guide:
"For additional redemption instructions, please refer to this link
How to redeem a Bonus Code:
- Go to Activation page
- Input the code and press REDEEM (Allow ~24h delivery processing time).
- You are done
Warning! Only 1 code can be activated per account.
The codes are valid till Sept 1st 2020"