hanging emergency cables

Hi, We had much snow here, 25 inches, a couple of days ago, pulled car into drive, ice froze up undercarriage, tried to back up and emg cables pulled off. Now emg brake is stuck full on. Would most appreciate any methods to release them. Thanks in advance

Is the cable jammed somewhere, possibly from ice? What year Seville is it?

thanks for reply, Have a 92 Seville and the manual release has no effect, also not frozen anymore, just stuck, is the a selenoid or vacuum on these?

They are vacuum operated. There should be a manual release under the dash, near where the pedal is.