Maybe this is a dumb question, but I am installing a basic surround sound (5.1) system. My house is being built right now so I have an opportunity to run the wires before the sheetrock is installed. I want to put in the speaker wall plates but I am not sure which wall plates I should use. I see the single-speaker wall plates (211-205) and assume those would work for the individual speakers, but what about the receiver?