There are commonly available two wire to single wire converters for this. The plastic shells on the connectors will need to be removed and the metal part of the connector plugged in, then secured with tape, or heat shrink tubing, as the Chrysler version is keyed differently.
http://www.crutchfield.com/S-QQDt8K9...750&I=209SIRSP
You don't even have to use the Chrysler antenna...
http://www.crutchfield.com/S-QQDt8K9...0&I=209SIRMINI
Some background on this... The first system was two wire. One part number gave you the two wire antenna and receiver and mounting bracket, the other part number gave you the wiring harness and two wire antenna cable.
The newer kit is a single wire antenna (lower profile) and receiver (about half the size of the first kit) with velcro to attach it, instead of a bracket. The harness kit gives you the matching single wire antenna wire and harness.