In some of the models there's a wire loom in there for the addition of a sub-woofer if you go with the upgraded radio Bose system. I have one in mine,but it's connected to the sub-woofer. Do you have the upgraded radio sysem?
2009 Murano LE, white/tan, 48K miles; with all the amenities you can pack into this thing. Whoever had it first was obviously a doo-dad guy. Can't watch DVD movies because the headrest screens are facing backwards!!