placing of the eyepiecelens after cleaning ?

Hello,
I know it's very stupid, but i have cleaned my eyepiece lenses and now
i know on wich side of the eyepiece they came from, but i didnt
exactly how the where positioned

The lenses have one flat side and one curved side as seen on this
pictu
http://members.home.nl/hotze.b/eyepiece.jpg

Can someone tell me how i must place the lenses ? (on wich side the
curve or convex side) ?

Thanks very much in advance
Harry