live scope guys, 80 yrs. old and just bought a live scope bundle. echomap ultra 2, lvs 34 transducer and black box. ready to power up, the power cable for the echomap has 2 very small wires. brn. and blue, I can't find any info on these conductors. would one of you guru's please help me out? also it says to ground both units together, could I ground them to my alu. boat frame? any tips would be helpful. thank you