I cannot comment on the new Jaguar CDI's because from your description, they uses switches instead of jumper pins.
With the older Jaguar CDI's, the ignition timing curve was set at the most advanced when all jumper's were removed from the pumper pins, and the most retarded ignition timing curve was set by installing the jumper's on the jumper pins.
Two other ignition timing curves could be selected by having the "A" and "B" jumper pins fitted with only a single jumper, and switching around which jumper was installed on the "A" or "B" jumper pins.
From your description, you must be able to toggle the switch to replicate the old method of "jumper installed", and "jumper uninstalled" settings.