If I remember right, you have to squeeze the dickens out of those two tabs. disconnect the cable from the cruise sensor and it will give a bit more slack.
This is my experience with another ford, should be very similar on the stang. Mine did not have a cable when I got it, nor does it now.
yes, theres a tab there, its a big pita to take off, it took me forever, just be paitent with it and take ur time and you will se how it comes off, but there should be a little tab to push or pul and it should pop off