iPad 2 digitizer replacement problem. Maybe?

Help people. I was replacing an iPad 2 digitizer but during taking it off I tore the power button flex cable so we went ahead and ordered that probably be here tomorrow or Wednesday. Well anyway I decided I'd clean the iPad all up and find how I'd tuck the digitizer cable under the LCD screen. Anyway while doing that there's this little piece with 2 holes that is like a little tab sticking off the digitizer cable. That tore off of the digitizer. I don't know if that part is important or just there or what but can someone please tell me what that little piece is for? This is the 4th iPad I've fixed and never had either of the problems I had with this one. Please tell me what that part does or if its important. I couldn't test the digitizer because no power button flex cable and I don't feel comfortable turning on the iPad with something unplugged from it. I can still plug in the digitizer but this is just a little piece that sticks off from it.