Where do I place the codes?

[SomeKindOfMetroid]

Well, that's up to you. Any codes you don't keep, you won't be able to use. So if your goal is to play Brawl Minus, make sure you keep all the codes Brawl Minus uses.

[Wiisam]

Thats not what I mean. I mean there are some important  words in order for brawl Minus to work such as this:

Sorry but you are not allowed to view spoiler contents.

I left that thing out  including my codes and I don't understand y the codes doesn't work.