Aerial adapter

[French Auris]

Hi all. 

I'm looking for if they exist a aerial / GPS adapter so I can continue to use the shark fin. 

I'll be coming off the rear of a alpine HU, more over if there is a 3 way adapter so I can use the HU DAB as well. 

I have looked on Evilbay but I'm a little confused. 

Tia. 

[flash22]

The shark's fin is FM only IIRC, GPS aerial is under the dash (if the car had nav), if the car has DAB from the factory it will be a black plug and an aerial on the front screen (driver's side)

Factory plugs

GPS

 

FM - what connector does the pioneer have, is it iso or din

CT27AA79 - Din type

CT27AA78 - ISO type