Slide an opening pick under the battery cable and pry up to separate it from the frame.

If the adhesive is stubborn, don't force the pick. Reheat the cable and try again.

During reassembly:

If your battery cable has a plastic liner, remove it. Otherwise, apply double-sided tape to the underside of the cable.

Line up the cable with its screw post and alignment peg, and press down to secure the cable to the frame.