Given how many of the wiring harnesses for optional equipment are there even if you don't have the option, it wouldn't surprise me if the power locks and windows were already wired, and just need the parts installed. I'm pretty sure that all cars without nav, still have the harness for the controls below the center console--and that's a relatively uncommon option compared to power locks and windows.
It'd be pretty easy to pop off the door panel and see what's hanging out in there.
It'd be pretty easy to pop off the door panel and see what's hanging out in there.