It is easier/cheaper to ask all of you these questions than the dealer

Here is a problem I forgot when in Apache Junction--
The kitchen window has two turn and latch thing-a-ma-jigs. One is doing all the work. How do I tighten it? I see from the outside with the window open that there is a nut/tap that is tightenable/removable. Should I remove the thing that sticks up and actually pulls on the window and bend it so it helps hold the window shut?
The nut/tap is as tight as it will go--the piece of metal is just too far out to pull the window in when you close the latch.