The lighter base you have is a standard replacement for any car/truck.
You need the following connector which was made for this type hook up (threaded screw). It just pushes on and will not fall off. It is insulated and is the eaisest connector I have ever used.
It is
AIRTEX Part # 1P1063 You can get it from O'Reilly Auto Parts
http://www.oreillyauto.com/site/c/search.oap?keyword=1p1063+[/color]
Rock auto parts also has it.
http://www.rockauto.com/catalog/raf...partnum=1P1063&a=FR903-1P1063-856074Check Ebay or just Google Airtex 1P1063

Harold