How do you disconnect battery cables on a 1994 jaguar xjs?

To disconnect the battery cables on a 1994 Jaguar XJS, first ensure the ignition is off and the keys are removed. Using a wrench, loosen the nut on the negative battery terminal (usually marked with a minus sign) and remove the cable first to prevent sparks. Next, repeat the process for the positive terminal (marked with a plus sign). Always secure the cables away from the battery to avoid accidental contact.