I recently purchased a 1984 mustang gt 5.0 liter, with a 5 speed in it, i parked it, went inside to eat and came out, went to push the clutch in to start it, got about halfway down and heard a loud pop and the clutch pedal fell loose, it didnt just stay down it just rocked back and forth like if someone broke their arm almost completly off, i can just touch it and it will swing back and forth, we looked under the car and their is a piece of cable attached to a nut under the driver side door about 4" long, it may have just been a coincidince that it was laying there but idk, it still starts up when i press the clutch in, whats wrong with it and how do i fix it? thank you.