While I do not in any way disagree with Maine or the dog, I do mine differently. Been doing it the same way for a long time, and have never ever had any connections fail. I use a crimp connector, using a non ratcheting tool. One of the cheapos from the box stores. For a reason. This leaves a slight gap at the wire end of the crimp. I then solder the crimp connection, apply a light coating of 5200, and heat shrink over that. Heat from the center out, forcing the 5200 out the ends of the heat shrink. Then apply a coating of liquid tape over that. May be the wrong way to do it, and might be overkill, but it works for me.
Dream like you will live forever. Live like you will die tomorrow. ( James Dean )