Here the black cylinder connector from the original harness is in place. Orange and black wire on left side are factory and unchanged. Wires on the right are cut and re-routed. The one that used to run straight to the battery terminal is now connected to a fusible link that provides power to the auxiliary cooling fan which operates off a temperature switch in the upper radiator hose. The wire that originally connected to the alternator now connects to the third wire on the new harness.