Me too. Isn't that thing such a b*tch? Terry should REALLY make a BIG asterisk about that in the install guide.
However, they have no reason to go in there, they do all the ECU reading/updating/etc from the port under the steering wheel. Unless they already suspect something, they won't check it out. And, personally knowing a BMW tech, they don't really care. Even if they DO suspect, they'll take a quick look, not even notice a little green piece missing, and go about their day so they can fix the car and go home.
You'll be fine