Anyone know where this connection is supposed to go on the 05 CTT with base optical connections? This is an optical cable but have no clue if supposed to be disconnected, or connected somewhere. Ever since son driving this car, all sorts of crap popping up. Just looked and found this connector as you see in Pic.
where does it go? There is also another flat black connector, that is not connected anywhere but I don't see anything within its range to plug in.

Thanks for help.