What does the hook in my channel balance attach to?

A quick learner from Santa Cruz, CA says:
January 14, 2012
Hello: Does the hook in the channel ballance just hook into the oval hols in my window sash or so I need attach some type of plastic hook on my sash to catch the chennel ballance? Right now, my sash only has a slanted part at the very top (veritcal slide) and an oval hold near the bottom (on both sides of course).

Thanks
-Ed
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Paul from SWISCO responded:
January 18, 2012
Thanks for posting. Actually, the balance should hook in a hole punched in the middle of the main sash track, not on the sash itself. Please refer to the video below on how to install a channel balance in a non-tilt window.
16" Series 380 Channel Balance
16" Series 380 Channel Balance
S380-16
$9.34
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