The chart on fortification.com lists the "5" car line code as: "5 = Recreation Vehicles (1974-75), Continental (1982-later)". So this cable was probably for an 80's Continental. And even if that was the original application, it could still legitimately be a service part for C3AE-14300-CA, like Jeff said. I don't have a parts catalog new enough to answer that.
Or the lister goofed and unintentionally mismatched the description to the photo.