Hanging onto the cable tie is easy and a cinch to guide the wire/s to the right place. In addition, you don't get hot fingers. Just snip the cable tie end when finished or if you really want people to wonder how you ever got to solder that difficult joint, carefully remove the cable/s altogether.
Sorry these pics don't show the soldering iron in action as it's impossible to hold a cell phone camera, solder and hold a cable in one go - however you'll get the idea


Oh, and no smart comments about the heat shrink ok

