Yea I know what you mean. However solder is no more permanent than a crimp butt connector he is already using. You can cut them both lol. Just more work to redo it.I didn't suggest soldering them because thats more of a permanent connection and by doing that it makes taking the front plastics off a bit more annoying. But I agree with all of the above a good solder joint will well and truly hold your wires together and provide a good electrical connection. Its simple to learn, and will be an invaluable skill to have.