Not that i'm too well versed in the stock BOSE equipment in this regards, but if you have the Bose system and other's who have it with the USB, which yours does not from what I'm gathering, I would imagine that it would not be too difficult to using Tennessee's DIY to remove the dash and stereo unit to examine the rear of the unit, then using the FSM (use the search function on here to find and download), you could locate the USB wire part from Nissan Parts and then wire this in DIY style. Now , let it be known, I'm using pure logic and deduction. Only speculating the parts of the equation at this point. Thus tho, this leads back to my other posts, ;-) .........
just eliminate the BOSE equipment all together and replace HU with one which has USB already dedicated to it
then it has all the function for your ipod /iphone.
Just thoughts ... GL!
-Osirus