I have a 2011 Puma FTD. I have a bad power cord at the bow, (my graph turns on normally on a friends boat…will not fully power up on mine) so want to replace. I tried pulling it out thru the clam shell but it doesnt pull far enough, and didnt want to tug too hard. I tried reaching my arm in thru the TM plug access panel and cannot find the power cable. So question is, approximately where would the Humminbird Cable be spliced into the boat power? I want to fully remove the power cable or at least be able to inspect it before i splice a new one. Any suggestions would be appreciated.