I have a 1998 Jaguar with a 1240 lowrance flasher on my dash and a lowrance X75 up front, both original equipment. I am replacing both units with two 998c si. My question is can I hook up the existing power supply from my flasher to my 998 on the dash, and can I hook up the existing power supply to the x75 to my 998 at the bow. Power supply to both of them is by the master control switch. Could you guys give me your opinion. The right way to do it. Please give me your advice. Thanks.