Hi,
Probably with this :
http://www.horizonhobby.com/Shop/ByC...?ProdID=HAN173
or this :
http://www.rc-electronics.co.uk/buddymate.htm
Or if you understand some simple electrics (not electronics), and you know which side of a soldering iron is hot, check-out my website (aspecially chapter 1, paragraph 1.6).
Olivier