Just a small comment on the solder vs crimping or screwing.

In high vibration environments such as in aircraft, drilling tools and military vehicles, it has been found that solder joints are more likely to fail. The solder wicks up into the cable and causes a hidden stress concentration and a slight heat affected zone in the copper. Also tin whiskers as discussed here: http://www.aviationtoday.com/av/comm...ers_76599.html

Depending on your application, my recommendation would be to see if you can crimp a ferrule boot on to the cables and use screw terminals. Also to note, some screw terminals are not meant to take a soldered cable in them.