We use the term in my family to mean "airside, but not the piers" - i.e., the main shopping/restaurants area. I assumed that's what the OP meant.

I didn't recognise the first two photos the OP posted - is that the bus arrival area on the Schengen side? (I normally arrive at a gate on the Schengen side, so only know the non-Schengen bus area)

I don't think we can really answer the OP's question without knowing where his relatives are flying in from, and on what airline. They may not even arrive at a bus gate - just because the OP did doesn't mean his relatives will.