I took my door latches out to clean & found a funny "S" piece. looks like a spring, NOT the return spring, in 1 latch it was broken & don't remember where or how it went in the latch. I have the full size picture of them & it DOESN'T show this piece ? The latckes work OK & outside handles DON'T sag. Anyone have a picture of the latch or know what this piece is for ? Thanks Mike