Help!! BMW x5 front bumper dislodged!

[betsy]

I was parallel parking into a really tight spot and as I was backing up I hit the car parked across the street. The front bumper looks like it was just disldged from under the metal part, but from the license plate to the pasenger side everything looks fine. The driver side part of the bumper looks like I can just push it down a bit and pop it back under the metal part (just a little plastic tab from what I can see is preventing me from doing so easily). No wires are loose from what I can tell does anyone know if this is doable or recommended? PLEASE Let me know what you guys think!! Thanks!