I've checked most of the builder sites I can find, but I'm having trouble locating pictures of the connector (inboard) end for wiring of the stall horn and lights.
I'm not really sure how it goes or looks. Any pictures or links?
Hope that gets you going in the right direction. I have added a second landing light in the left wing for wig-wag operation so that is why there are so many wires in addition to the stall warning wire and ground.
You mean the wing's electrical connectors? I have a picture of the right wing root after changing from the previously used screw heads to a floating plug. Therefore I am not sure if this is part of the wing kit now or if it comes with the fuselage kit.
Also note that the female plug shown in the picture is for the right wing. The left wing would have the male version which has pins in its diagonal corners.