I just recently bought a new house, i got it all "pre wired". So I have two plates at the back for the back speakers. Another two at the front for the front speakers. easy right?But im looking for another plate to connect my receiver so those speakers will receive some sounds. All I can find is a plate with a coaxial, and another one with 2RGB & 2Cal5! Did I get screwed here? Or am i missing something? can you guys help? im really new to this...thanks!