Newb here with a JLU Sport. Has anyone tried to upgrade from the base U Connect 3 with the 5" screen to the U Connect 4 with the 7" screen (part #68297546ae)? I feel like it should be a simple plug-n-play with a dealer flash, but I'd like to verify before ordering the UC4. If anyone would be kind enough to upload an image of the back of their UC4, that would really help too, just to verify that the wiring harnesses are the same. Thanks!