Jason Bear

I recently purchased a home that included a home theater set up that the previous owner sold to me. The system includes Klipsh Speaker towers and a Dennon AVR X3400H reciever. Everything seems to work great except I cannot figure out how to connect the sub wooder. I have the WA-2 wireless connector but cannot figure out how to connect it to the Dennon reciever. Do I need to strip the recievers RCA cables to conenct to the back of the reciever the same as the tower speakers are conencted? I don't see any other subwoofer outputs other than the one which requires you strip the wires. Any help would be greatly appreciated! I have been researching this for days and have had no luck finding a solution. Thank you!