Ah gotcha. The N- is drawn splitting in the diagram just to make it clear which switch lugs it needed to connect to, otherwise it was too messy to see clearly with just a pencil drawing. The N- just needs to make a connection from the push/pull lug to B5<->B3<->C4<->C2. When I actually wired it, because of the size and depth of the switch in the cavity, I ran the N- connection from the push/pull to C2 then C4 then B5 then B3 (black wire in the two photos below the diagram).

I can’t access either of your image links, invalid or no permission.