Find a cone shaped object like the end you cut off a tube of caulk that is a little bigger in diameter than the the transducer connector. Drill a small hole in the end big enough for you to get the string through. Slide the string through the cone and tie it on behind the connector. Tape the cone to the connector so it will stay lined up and if you have to pull back the cone wont stay in there. It will spread the other wires and cables out of the way as it goes. Also tie on another string to pull in for future use, always pull a new string when pulling the old one out. Keep working at it and you will get it. Don't force it.