Humminbird Fishfinder, Piranhamax 210 Pt 4068401 Plus "lcr" Questions

looking for swivel mounting bracket for a humminbird lcr 4 id part # for the mounting braket from humminbird is gmlcrp and haven't been able to find out who might carry it on such a old model.

Humminbird LCR 4 ID....I lost power cord and am trying to find out which 2 pins are the ones for the 12vdc power. There are 6 terminals but I know some of those are for temp probe. thanks, rick use ...