Also, the Humminbird website specifically says ...
"This cable should not be use to connect a HELIX fish finder with both MEGA 360 Imaging and Built-In MEGA Imaging on Minn Kota trolling motors. Please refer to #720108-1 14 M360 2DDI Y for this specific rigging need.
Is not compatible with Built-in MEGA Imaging transducers on select Minn Kota trolling motors"
This contradicts Wayne's advice.
No offense intended, just pointing out more source of confusion.