I too broke the clips when replacing the screen on my ipad 3. So i cut the connecting portion of the ribbon cable from the old screen that I had just removed and slid it into the slot on top of the new ribbon cable. I cut off the excess and this provided a tight connection and my ipad and works like new. I used a randon piece of ribbon cable to do the same for the LCD ribbon cable. If you need help I will be glad to answer your email. Ergrunt@hotmail.com.
Good luck