A curtain airbag assembly is provided having a number of airbags 7a, 7b, 7c and 7d arranged in a side by side relationship. Lower ends of the airbags 7a, 7b, 7c and 7d are linked to the adjacent airbag by an airbag tether connector assembly 10. Each of the tether connector assemblies includes first and second connectors 20, 30 that engage with one another and snap together to fasten together two tethers 26, 36. In the event that the first and second connectors 20, 30 are not correctly coupled together an indication of this fact is providing in one of a number of manners thereby reducing the risk that a vehicle 5 fitted with such a curtain airbag assembly can enter service with one or more tethers 26, 36 not connected.