Just been revisiting your photos in the ref/image. There are some excellent ones for detail. I think it is a case of something is missing but I'm not sure what. So looking at your photos and the close ups I now see that the control between the flaps is a vertical rod not a wire. It may be a case that I need to trace the start and finish of control wires and see how they attach and to what. Some originate or disappear into the wing. Some pulley wheels have the control wire comming out ot the glass cover and some don't.
And check the SE5A folder, just uploaded some plans for you