I got one for the same year, and it pluged right in.
I found the connector for the digital DIC wrapped in tape, attached to the harness currently in use.
This is for a 97, I don't know about other years. I did see info with pictures and diagrams on other GP club pages.
Do a search for "DIC swap".
To my understanding all the cars at least 97 to 03 share the same wiring. Depending on the options is what the front end hardware would look like. So I bet that before you getting the DIC you will find the connector like wbs97gp wrapped somewhere behind the actual DIC you wear