Here's a picture of the headlight switch for 69 and newer.
Here's a picture of a key switch I can list the wires if you don't know where they go.
Here's a picture of the cluster wiring for a gauge dash.
The pink wire that goes to terminal 3 is the hot feed to the dash.
If you have dash lights the cluster is grounded. The key on the left tells what wires go where, if you can read it.