Should a fish finder be wired directly to the battery?

Fish-Finder & Transducers, Alaska Fishing Gear

Fish Finder Wireless Sonar Sensor Fishing Depth Finder Locator Fishfinder With Wired Transducer For Boat Kayak Fishing - Fish Finder - AliExpress

How to install/wiring Fish Finder on your Kayak -

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What Battery Do I Need for My Fish Finder?

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LUCKY Sonar Portable Fish Finder Transducer Wired Water Depth Finders Boat Kayak Transducer Fish Finder Handheld Fishing Gifts for Men : Electronics

Working on wiring some basic toggle switches in my duck boat. Here is the diagram, does this seem right? Where do I add inline fuse holders, if even needed? Have been wiring

LUCKYLAKER Wired Sensor Fish Finder, Waterproof, Portable Depth Finder Display, Transducer, Kayak, Fish Finders, Sonar Fishing Gear. - Outdoorsi

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