Ew Bose. But a headunit is a headunit...you might not like what you find when you pull that one, though. Harness might be cut, as is common when people are too cheap/lazy to install a pigtail onto the factory connector for hooking up the aftermarket piece.
Also, doesn't Bose usually use external amplification? If so, I would wonder how that thing is wired...if there is another amp(s), maybe it just uses line-level inputs...