Proper Timing/Orientation for FA762H SCAR Flash Hider?

This will be my first suppressor. The Form 4 went pending November 16th 2012 so I should be getting the suppressor soon. I was wondering if the orientation of the suppressor on the barrel was of any importance? I have the rifle zeroed for now without the suppressor and I’ve fired 1,200 rounds with no problems so far. I just wanted to make sure I don’t run into any issues when using the suppressor just because I may have not installed the flash hider correctly. I’ve included some pictures. If anyone has any input that would be appreciated.
Thanks!