We just moved and in the process of hooking up my sub-woofer to the back of my Denon AVR-5600 I don't know where to hook it up to. I misplaced my Operating Manual in the process of moving. I'm using a co-ax cable but couldn't a place to plug it in the Speaker System at the back of the receiver. Please help. My email address is: bigorne1@aol.com Thankyou very much.