Just to add to Druss's great advice there is a video on how to solder Deans connecters over at helifreak.com by "finless" Bob White that really clarifys the process. If you are new to soldering lipo's it is a highly recommended video to watch.
http://www.helifreak.com/showthread.php?t=41692
The site does require you to register to watch the videos but is well worth the effort.
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Of all the things I ever lost....................................... I miss my mind the most!