The hose from my sprayer connects under my sink with an almost air-hose type connection with a small O-ring. (which is fine), What seemed to be left after it came off was a plastic casing in two parts, held together with wire. It comes from the manufacturer this way. Can anyone please explain how it goes back together, or what I need to fix it ?

I have installed a few of those. I can't remember if it was moen or price pfister. Basically the 'wire' is a clip that holds it together and catches the groove to hold it on. I have taken them apart but was able to reassemble while there and I don't remember how but remember it was easy.

Thanks doug238 your right. I went to menards and found one like mine called Quick Clik or something like that. The two plastic pieces fit into the connector and the wire holds them together ,and "click" it pops on like an airhose. (I lost the wire but a small rubber band worked perfectly.) Fractionation Man