My cable TV operator is providing hathway set top box that have 3 pin connectors (as shown in image). One pin for video and 2 pins for audio. I have an old TV set. As AV-Input, it has only 2 sockets. There is no way to test the setup without paying and getting Cable connection installed. What if I take the connection and connect video pin to video input socket one of the two audio pins to only audio input socket? I might get single channel audio, but is there any other limitation? I am not sure if such connection works. Please advise. .