Different model, hm324 going by my googling....
Managed to find the right part (hot shoe) that was in my box of electrical bits and pieces, now just need to buy a voltage adapter drop the cigarette plug to 6v as the one I found was 9v and then work out how to turn an rca into something useful.... This is where I will have trouble. Computer /tablet/phone don't want rca inputs have a reversing camera but that then need it's own power supply
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