Connect Denon AV 1800 to Mivoc 10 G2

I would connect my Av receiver to 1800 with the subwoofer Mivoc 10 g2. I have a 5.1 system. So the MIVOC is my only subwoofer. Can someone please send me a link from Amazon, which cable is best for me to buy here? It has to be put in line in (right and left) of the subwoofer or not? So I need a Y cable. Sorry, I just don't know enough about the subject.