I have been experiencing similar power issues with my Helix 7 for the past 2 seasons. This past open water fishing season I had enough. It would power off even in a ‘walleye chop’ going from one spot to another. Through a lot of online forums, I tried bending a pin on one of the cables (to make a tighter fit), electrical tape around the bases of each cable and also tried cable ties – all without success.
Recently, after discussing with a Millwright at work who is an avid fisherman, made some very simple retaining brackets for me, which utilize existing screw locations. These are not going to move! I’m excited to get out on the water in 2021.
Hope this helps anyone else with similar issues.