I am trying to install a new radio in my ‘16 accord exl, the harness they sell on eBay does not fully connect to the original harness, and according to shops they do not sell a harness at all for the exl. Has anyone done this before? Do you have any suggestions? Do I just need to hard wire it? If so do you know where I might be able to find a wire diagram? And lastly the antenna connection is also giving me a problem, any suggestions for that as well? Thank you