Service manual with wiring diagrams is in your future, if you don't already have one. It's very useful for a lot of other questions that come up from time to time.
I actually picked up an original Plymouth 1967 model year service manual in excellent shape at a swap meet a couple of weeks ago along with year specific original engine spec cards and model year specific operators manual that would have came in the glove box. The operators manual was a re-print. The folks that were selling them had years specific manuals for all different kinds of year/make/models manuals and documentation.
