I I asked support about what I needed to add a GT8 in hull transducer to my console unit which already had a gt54 installed and I was told to get a 010-121**-** an 12 pin to a 8 pin and it would work but it will not work as I have a open yellow connection for lvsxdcr . Now I cant use the GT 8 and now I cant get an answer. Very upset after spending so much money and now cant get help and no adapter cables in box. User's recommendation: Hi with Lowrance.