Not really south, it's just a bit north:
Ponta Delgada - Latitude: 37.7333 Longitude: -25.6667.
Lisbon - Latitude 38.71667 Longitude -9.13333.
It is the exclusive economic zones of Portugal that are in the path of the cable: https://en.m.wikipedia.org/wiki/Exclusive_economic_zone_of_P...