There is a un attached electrical connector in vicinity of the ABS distribution block. What is it for? it has me baffled nothing I can find in Haynes or Chilton manuals.
Sometimes cars are built with a wiring harness that has cables for pretty much every possible option sold that year, and what you are finding could be one of those circuits that is unused on your car. The connectors are often bound up out of the way on cars that don’t use the circuit, but the zip tie may have broken after 25 years.