Stock touchscreen head unit xplay aygo

[tomashen]

i currently have 2009 aygo with aftermarket head unit "pioneer" with rca outputs where i have an active sub(built in amp) connected to along with 2 front aftermarket Speakers.

 

I am soon getting a 2015 aygo with a touchscreen stock head unit however, i want to connect the same active subwoofer(built in amp) to it. I believe the unit does not have any rca outputs? How would i connect this sub then? 

can someone help out with links to ebay  ? I am in the EU , Ireland. 

I am also considering upgrading all the Speakers inside (if they will be crappy and quiet). I am mostly worried about connecting my subwoofer there for the time being and later on upgrading to better Speakers.

 

Can someone give me a run down how to connect the subwoofer alone for now.

 

And if possible, also on the side, explain the best route to speaker upgrades, if i need any other things. I am not good at these things with amps,crossovers etc.