Dual / Two FM Radio Antennas with Fakra connectors Mondeo/ Focus to Single ISO

[90Ninety]

So I upgraded the stock factory HU on the venerable old Mondingo mk4.5 , with a fancy Android Head Unit . The new HU is leaps and bounds better, watching Youtube   while driving isn't the best idea but , in traffic its ok ,,,, Anyhow I digress 

 

The old CD6000  had two antenna wires with Fakra terminals  , the new Android HU has a single ISO connector . See the image below , this is the back side of the original HU 

 

 the next image is the two terminals coming from the harness 

 

 

Unfortunately I could not find any schematic to understand what kind of circuitry or wizardry is attached to these two antenna wires .  My best guess is that they are two antennas ,and one of them potentially is boosted though the original HU .  My first idea was to find an adapter, however it appears there are two types of adapter  ( fakra to ISO ) one passive ( I tried this , see below )

The passive Fakra adapter only made the signal worse, I understand this passive adapter simply injects voltage into one of the fakra plugs , which is supposed to be attached to a booster  , though I have no idea , if there is a seperate booster in another part of the car . I simply simply disconnected the voltage side ( blue wire ) of the the antenna adapter  in the interim so only connected on one terminal  . The old HU had a great signal FWIW

 

The active adapter that I found actually has a 'booster' , so contains circuitry , an image is shown . Source Amazon item page

This 'active' adapter is actually sold with the Aftermarket HU ( pumpkin PX5)  that I had purchased , so I am hoping that this will be a solution , if I can just find a supplier that has stock , the particular active adapter is not perfect as it has two Fakra connectors moulded together  . 

 

Can anyone suggest any options , or should I just take the plunge with this 'active booster' ?

[90Ninety]

After further reading I understand that the two facra connections go to two separate modules located around the rear  window screen . I understand one uses the rear heating screen element  as part of a 'Diversity Antenna' 

I am reading conflicting information about weather these two antenna modules , should be connected together ,  or if to leave one disconnected  and if so , which one ( black or white ) 

 

I understand one of the amplifier modules is powered via its own 12V input  ( power from windscreen wire ) , while the other requires power from the HU 

 

This is all very confusing :s