Casement multi point sash lock

You're 100% right, tie bars are attached to the window using a guide like our 39-417. These screw directly to the window frame and then the tie bar fits into that hooked clip you see. Could you get this to work for your application?

If you look through older discussions for the 39-417, you can see other customers who have submitted pictures of their complete systems already installed. I recommend browsing through some of them to get an idea of what I mean.

Thank you for clarifying! I think I can help. Take a look at our 38-276 and 38-279 keepers, along with the 38-279 and 38-280. These are just a few of the possible keepers you'll see used on multi point locks.