How to use pre order bonus items?

Question

I have an Amazon preorder bonus code for Assassins Creed 3. I followed the steps to get the bonus items -

From the main menu of your game, go to the Extras section, 
select 'Exclusive Content', and then input your unique code.  

Well, I did go through all of the steps okay and entered the code, it was accepted too, but I don't see any difference or where to wear the Aquila's uniform or get the boarding axe.. I thought I might have made a mistake and tried to enter the code again, but it just says the code has already been used up.

Is there something else I need to do in order to get the mentioned items?

Answer 1

To access this content, you must have completed Sequence 6 in the story to gain access to the Homestead. This is also around the time you will become the Captain of the Aquila, so the costume will be more appropriate.

Answer 2

You need To go to aqueilas house and enter ssabmud