MEGA SI Trolling Motor transducer

[Ramos27]

Simple question but what is the red/black wire connector for that comes with the Mega SI trolling motor transducer?

[Wayne P.]

That is a RFI Choke that goes on the starting battery charger lead of an onboard battery charger that charges both the starting battery and trolling motor battery/s.
It is included with the trolling motor adapter or a trolling motor model transducer that does MEGA Imaging---it's the Megahertz thing.

You should have a yellow paper in the package that explains it.