The Elite 7 HDI transducer can be mounted to the trolling motor with the trolling motor adapter cup.
Lowrance HDI Trolling Motor Adapter Cup f/Skimmer XDCR
The only issue will be that you can not zip tie the transducer cable to the trolling motor shaft due to the shaft sliding in the shaft sleeve. I have seen some using a spring attached to the top of the motor head and attaching the transducer cable to the spring keeping the transducer cable taunt....
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