easiest way is to remove the trim pieces above the rear windows, the sound bar is resting on them. they slide toward the rear once you remove the screws, dont pry on them our you'll bend them up, those ones are metal not plastic. then just unplug the wires and you're done. theres probably a hole in the headliner for the wires to come out. oh yeah if yours has a dome light on it take that off first, i think its screwed into the body and the soundbar wont move if you dont take it off first.
i wish i could remember what i did with mine, it dissapeared in the garage and i never found it lol. selling yours? i'd be interested if you are
hope this helps
-mike