Nissan is really bad about accountants running manufacturing, and they have a gazillion different harnesses based on options and trim levels. Basically, if it doesn't come with something from the factory, you probably won't be able to put it in unless it is available from the accessories kit or we slipped one past the accountants. What the bean counters don't see is all of the warehouse space it takes to have 65 different headliners and 70 difference #1 body harnesses for example, and because there are so many choices, we have to spend more money on error-proofing and poke yokes to build vehicles properly.
I liked how my '05 F-150 had wiring for the factory subwoofer and upgraded sound system, and a subwoofer wasn't even an option on the XLT trim level. I think that I also found the sunroof and DVD wiring up in the headliner in that truck, and I had neither.