I used a solder pot to tin the wires, then I have a good weller soldering iron that sets the temp to 650, the other method is to use solder sleeves, they are a piece of heat shrink with a band of solder on the inside. It seals and solders all in one action with a heat gun. Tim

http://www.youtube.com/watch?v=24FjjIVpk9U&feature=related