Before I go up to Philly, I was going to put on a wind deflector I had bought over a year ago. The guy said it was for his Z3 and it was from BMW and fits onto the back of the car which is supposed to have a place for it to attach already but can't make heads or tails of it. Perhaps the wrong one? Aside from the screen that's stationary,there is another screen that pulls out from the base Frankie needing help...