There are a few different ways that you can connect a fish finder to your trolling motor. The most common method is to use a transducer mounted on the trolling motor. This type of connection will allow you to see the bottom and any fish that might be in the area. Another way to connect a fish finder to your trolling motor is to use a portable fish finder. These types of units come with their own transducer and can be placed anywhere on the boat. The third way to connect a fish finder to your trolling motor is to use an adapter kit. These kits will allow you to connect your fish finder directly to the battery of your trolling motor.