Well I got my new Rio in today and was just about to install it in my car when i noticed that the orange ignition sense wire was just dangling. Its connected fine in the ISO connector but the other end I assume is supposed to plug into the car bay. I'm wondering if this wire is actually needed. I'm having the Rio run into my head unit (which runs to my amp). If I do need this ignition sense, then I assume I only need to connect the yellow to power, black to ground, and orange to ignition sense. Is this all I need? If so could someone tell me a way to easily get the orange wire back into the Rio? Thanks.