Bombywalla,
You bring up an interesting point which I am not sure of myself. With the Alpha Core Goertz MI-II Veracity cables I have, the Zobel network is integrated in the cable and is positioned where the spade terminations are. I hook those ends up to the woofer binding posts on my speaker.
If I recall the Merlin diagram correctly the Zobel they were showing was on the tweeter (upper) binding posts. Of course they had jumpers connected as well so I don't know if this makes a difference.
I would be interested to know what you think of my Alpha Core configuration. Based on what you said it appears to be after the crossover.