Installation guide for series3 85 channel balance
Hello,
The video below is the only guide that we offer for installing non-tilt channel balances but it looks like your window does not have jamb liners, which are required for installing side-mounted balances. Unfortunately, that is not something that we can supply but a local millwork may be able to assist you.
I'm sorry that we won't be able to offer more assistance with this repair but please let us know if you have any other hardware questions. Thanks for posting.
As Casey mentioned, your wood sashes don't use side-loaded balances that require take-out clips or spiral balances. Instead, they use jamb liners. You'll need to remove a sash so that a millwork can fit you with replacement jamb liners.