When making electrical connections, there is a lot of conflicting opinion. Some think that the only good connection is a 'soldered' one. Others would go with a crimp connection. Crimped connections are great with multi-strand wire. A crimp for the connection, another crimp for the insulation, cover the terminal as best you can with heat-shrink tubing. This will give additional strain relief. NEVER EVER use a crimp connection with solid wire. You willl end up with a bad connection. Also, if you use a soldered terminal, be sure that you strain relief, (clamp wire close to lug). Failure to do so will result in a faulty connection. Vibration sooner or later will break the wire. I know of a case where this happened on a magneto lead. Fortunately it happened after shutdown, and not while the line boy was pulling the engine through with mag's off. Workmanship,method, andcorrect tools are very important with electrical connections.