Need help wiring JBL Basspro Hub

[CarGuy247]

So i have a 2014 SQ5, I would like to swap out the stock Bang&O subwoofer and put in the spare tire sized, amplified JBL Basspro Hub.

The wiring, or lack there of has me a bit confused. There are only 2 wires going into the sub. A yellow/white (positive)and a blue yellow (negative)

I understand that the new JBL will require power (which I already have a wiring kit/fuse for), but how do I tap into the signal wires? Can I use the current wires from disconnected sub or do I need to find other wires?

Do I need to add a converter? If so, which one?

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