Using a LSS-1 transducer on the trolling motor is more common than many realize. I helped Scap at Transducer Shield and Saver develop a combination 2D and LSS-1 transducer bracket for mounting on the trolling motor (can also be mounted on a step or jackplate). It even works with a Minnkota Universal Sonar model.
Side View of bracket:
Having StructureScan and DownScan on your trolling motor allows you precise information, the ability to scan and move the boat in the direction of the fish, structure, or cover, and allows you to spot schools of bait or fish to the sides that you would normally never see.