antec 1080 "card guide"

Ok, this seems like, and probably is a stupid question. I recently started getting some of the pieces for my new box. I decided on the antec 1080. For those of you with the same (or similar chiefteck case) my question is this....
At the front of the case there is a plastic bracket&.... Pulled it out checked the manual.. "Card guide"..... now I've looked all up and down the damn case and there's no real place to put it. Am I missing something? I don't get the point of it. If some one could enlighten me (other then telling it's a guide for my cards) I would greatly appreciate it.