A4 B7 Subwoofer in the Exeo ST

Good luck, I have an Audi Subwoofer (8E9 035 382) lying here, which is supposed to move into the trunk of my Exeo ST. On top of that there is the amplifier of the Audi (8E9 035 223), which looks exactly like the amplifier behind the right side panel in the Exeo. Next to the amplifier comes a two-wire cable from the sub, at the end of which a plug is clipped. Has anyone ever done this before? Do I quite agree that the two-wire cable is the loudspeaker cable for the Su b? Where do I connect this? I didn’t try it, but would assume that I can put the plug of my amplifier on the Audi amplifier. Or does my amplifier have to be on the sub? In order to get the sub completely into the shaft, something still needs to be removed. There is the forced ventilation… What to consider when installing it? Thank you very much for your help!