You should check under the spare tire for the amp/dsp, that's where they should be located. Also, if you're not sure about what connections you have then just two Eonon you have dsp and Nav...they'll send you all the harness you'd need and more (I got a set for each type of system in my box).

The camera I'm using came with the order free of charge, it's not a wireless cam.

BMW X5 4.8iS 2005

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BMW X5 E53, 4.8iS - 2005
Professional Stereo/Nav with DSP (modified BM54 module) - Converted to Eonon GA5166X with Reverse cam
4-Corner Air Suspension - Converted to BC Coilovers