You can connect SW preout of X2000 with coaxial cable to Left input of Paradigm SW.
There must be LFE written.I cant read in picture though but see something written near Lt/white input of Paradigm.
You need to connect the subwoofer cable from the black subwoofer out from Denon X2000 and to the Red (RIGHT) input of the subwoofer...this is meant for LFE