At regular intervals check for damage, deteriorated or burnt outer sheath, and signs of corrosion along the entire length of each battery cable because a bad connection can cause starting difficulty and detriments to engine performance. Inspection of cable terminal connection should be checked for cracks, loose wire strands, and signs of corrosion; white fluffy substance under the insulation should be causes for replacing the cable due to signs of corrosion. When disconnecting wires reconnect the negative wire last in order to prevent a short circuit of the battery. Remove these cables from the battery starting with one end and tracing it all the way to the other end so as to remove it from the 
Starter Solenoid and ground terminals with an indication of the pathway it should take when reassembling. If just replacing cables, bring the old ones to make sure, the parts are identical; positive cable is always red and a little larger in size while the ground cable is black, and a little smaller in size. Shape the threads appropriately of the solenoid or ground connection and to eliminate more rust and corrosion use a wire brush, apply anticipatable of battery terminal corrosion inhibitor or petroleum jelly. Screw the cable in the solenoid or ground terminal with the help of mounting nut/bolt and be sure that the new accessible part of the cable is sufficiently long to connect to the battery terminal, first connect the positive then the negative cable.