I have a Kenmore Coldspot Model # 72102100. I cleaned the refrigerator and removed the drawers. There is a skinny metal
bar and I can't find where it goes. But the drawers now look
like they are sagging in the front.

Skinny, and like a long triangle? Maybe a shelf support that goes in the middle of the two drawers. Describe it better?

At least post a picture.