Upper window hinge locks. Left and right are opposites.

Thanks for posting! I'm not sure if we have this exact part, but it is very similar in design to our 26-393B. I recommend that you carefully look over our dimensions to see how well they compare. If they differ in a major way, let me know how and we can work from there. It might be a good idea to see yours out of the window, if that ends up being the case, just to play it safe.

Dimensions for 26-393B