Eagle Fish ID 128 Installation And Operation Instructions Manual page 13

Clean the chosen area of the hull before attaching the suction cup. Locate
the transducer on the hull as shown below. Don't allow the bracket to go
below the hull, as water pressure against it can cause the suction cup to
come off at speed. 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. Plug the transducer connector into the Fish ID 128. Your
portable sonar is now ready for use.
HULL
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