i fix one thing and break two others

[Goliat6288]

sup guys.

so i bought new spark plugs for the ze. changed them and that was fine. i decided to put back the plastic piece that goes around the battery. i remove the positive with no problems. i untighten the screw and nut from the ground cable and i wiggle the cable off the terminal and SNAP... broke the ring breaks. i put on the plastice i find a way for the screw to hold both pieces of the ring together with pressure. then i start installing the postive cable and i tighten the nut... then SNAP... broke the screw in half. now its hold togther by a zip tie. fuk me.

anyone know the specs of the the nut and bolt?
anyone know where i can get another ground cable for the battery? anyone can make me one? i know i cant do it myself since you need a hydrolic crimper

thanks in advanced guys