Originally Posted by
northinsouth
How does that work in practice? Will my gate assignment leave me somewhere that circumvents security, or will I need to go somewhere different on my way to Z?
I don't know FRA well enough to know for sure, others may be able to advise better. But I believe since you will disembark from the SQ flight in the non-Schengen secure area of B, following the signs to Z should take you on a path there without needing to clear security.