Eagle FISHEASY 320C Installation And Operation Instructions Manual page 44

Moisten the cup, then press it onto the hull as firmly as possible. Tie
the nylon cord to the boat and route the transducer cable to the sonar
unit. Your portable sonar is now ready for use.
Portable transducer installed on boat transom.
NOTE:
For optimum operation, the portable transducer should be adjusted
so that it is parallel to the ground. For more information on this, see
the earlier segment on Transducer Orientation and Fish Arches.
Suction
cup
Hull
42
Bracket
Transducer