Whenever I need to pull a wire from one location to another, I tie a nylon line to it, then leave the line in place. This works for arches, from the upper helm to the lower helm, down to engine room, and anyplace else. If you have enough of them, it's a good idea to label them. And remember – if you use it to pull a line, replace it, or you'll be hurting next time.

– Jonas Butvila