Make sure to use the GE kiosks. Last time I went thru ORD it was a mess. No lighting, dirty etc, signs looked like they printed them on zerox and held up with scotch tape etc.

iirc, when you enter the room the queue is on your left for regular (They also have kiosks) go past and the GE kiosks are on your right, then you go past the center section and GE turn in is way in the back, no signs, non descript person standing there.

I found him by accident as I was one of the first people thru the line (second off plane) and was trying to figure it all out on the fly.