Color of the wires are orange and black with a white tracer.Hard to tell with your pictures the true color of the wires. The connector is correct for a clock but the wires should be orange and solid black, always on feed from fuse block on the orange. Gray and black for the lamp controlled by the dash lamp circuit.
ThanksJack - The color wiring diagrams are not part of the original AIM but were created by a member a while back. The full set is available over at Jim's http://firstgens.com site. Join up and head to the documents downloads section for the full set.
The RS wiring diagrams were not in the AIM but published in a small manual, now also available for download as a PDF file. It covers all three years, headlights to console gauges.