Hi, I have no idea how to hook up my HT system even after reading the instructions. I have my tv hooked up to my digital cable box via a coaxial cable. Next to that are the Red, White and Yellow connectors for IN/OUT, next to that is a Digital Audio Out connector, below that is S-video out, next to that is a usb port and next to that is a serial port. My question - what should I use to connect this Pioneer CATV box to my Magnavox MFX450? The MFX450 has a lot of connection options and it is leaving me a bit confused.