Getting up thru the helm tube to the box above was a challenge. Here is what I did.
I do not cut the connectors off to pull the cable. I use a 2' piece of braided expandable tubing (Chinese finger) to make a pulling eye. The photo below shows my fiberglass snake end that I insert the tubing thru and electrical tape back on itself about 3 inches.
Next I slide the connector inside the braided tubing about 12". I tie wrap it about 6" from the connector and then tape the braided tubing to the cable. The idea is to pull the cable not the connector. The snake and the braided tubing will come out and allow you to get on it and pull on the braided tubing and not the connector or cable.
This is the finished pulling eye. You can see the snake connection, the tywrap and the tape to the cable. You can also see the connector is not at the tywrap, its ahead of it so the "pull" is on the cable. This was after I pulled it thru so the tape is a little messed up.