I have a little problem, Right now I have a Runco Cl 510. I want to upgrade to a RS 900. The cables that were originally placed for the 510 are behind walls (I had cable run before I finished the room). My question is simple, is there any kind of connector I can use to allow the cable already ran fit the HDMI connector on the RS900. Another thought is would I want to use that cable. The setup is about 4 years old.