New From ORANGE COUNTY CALIF. p.s. HELP

hello ppl. ive got a '77 datsun 810. i got it practically restored with a N45 motor swapped in it (to my knowledge). i recently had a mini electrical fire and all my ground wires got fried including my emergency brake cable. ive been searching for a new cable for a while now. does anyone know what i can replace it with? i want to do major work for my car but i do not know what is compatible with my model. help me please!