what are these wires ? 1972 dart 318

Can wipe the grease off with a cloth or paper towel. Often thats quicker an deasier than starting big cleaning project.

Photos and routing of the wire to the NSS and reverse light switch in this post Daughters 72 dart not turning over

Some years there's an intermediate connector after the bulkhead for that harness.
Incredibly dumb question..Trans pig tail