you can do one of three things...
- find the male connector (BeckerAutoSound in NJ used to sell) - overpriced plus you'll still need to either splice into or add connector on other end and locate whatever you are doing w/in the wire length given (< 6" IIRC)
- take a std bullet connector Spread it open enough at the seam to trim a 'smidgen' off the barrel using wire-cutters or tin-snips. Then re-close to smaller diameter. I did this to add a hidden cig lighter outlet and worked great.
EDIT: See 1st attached image as previous flickr image now missing
- use 3m tap-splice or vampire connectors behind the plug on the wires. Sorry no pix but I did this on someone else's car and it also works great.
Here's the pin out in case you need
EDIT: See 2nd attached image as previous flickr image now missing
BOL