Humminbird MEGA Llive ICE Imaging Installation Manual page 15

Compressing the Lock Washer
Loose Lock Washer Fully Compressed Lock Washer
4. Connect the transducer to the Landscape Mode mount (see the illustration
Connecting the Landscape Mode Mount to the Transducer). The ratchets
are keyed. The ribs on the Landscape Mode mount ratchet should align with
the marks on your transducer.
Connecting the Landscape Mode
Mount to the Transducer
9 MEGA Live ICE Transducer and Base