It is virtually impossible to connect each wire again, which is necessary for the best reception. Wire the powercable directly to the battery instead of to a switchpanel. When the boat hits the beach the bracket will get damaged if the ratchet is not removed. Make sure the terminals are clean. The battery is an integral part of the motor s voltage system and clean terminals form part of this.
Clean terminals are an extra fuse .
Be sure to fit the in-line fuse. If the motor s voltage spike over-voltage can dame the unit. When installing a transducer inside the hull make sure that there is no air in the spot, where the transducer is mounted. A transducer can read through fiberglass etc, but not through air. Move this around inside the boat.