Looks like the answer. For some reason, probably cost, they have moved the aerial into the front screen from the rear where traditionally they are on other cars. On other models with the fin or aeriel up at the rear, the fin has the GPS in it if you have a wired heated front windscreen, other than that it's under the front dash. The bump on the roof at the back. The detachable aeriel on the rear is the mobile one. Others they put in the side panel. The dab / FM was in the glass.
The
Ateca dealer training manual SSP153 shows this... if some one wants to spend £7-50 on Erwin you might find something similar on the place of aerials showing it's upfront on
Ibiza
The
Ateca as well as other models now have the shark fin not R11 that was common. Think the mobile aeriel is now in the panel on those.
Looking at the 2022
Ibiza model picture the
Ibiza still has the R11 mobile aeriel at the back. The GPS bit won't be connected as said. Only used where there is a heated wired front windscreen that interfers with GPS aeriel mounted under the dash. Mobile aeriel could be in the fin... Think there is duplication of the capability of the components which aren't always connected but connected elsewhere.