Hello Mdrew,
Hope you are well. The plugs on the back of the HK and the sub are standard RCA connectors. Go to the Axiom homepage go to products and then look under cables and interconnects, use the coaxial audio cables that they have there, they have several lengths, you will need two of them, one for each channel.
The subs have stereo or mono inputs, depending on your hookup requirements, you will hook them up to the left and the right channel pre-outs that correspond to the M80 channels.
If you visit the SVS website they have pictures of the amplifier on the sub, it will be very clear once you see it.
No problem on the help, it is what we do here.
Later,
TonyM
