Aftermarket External Wiring Harness.  Goes to motor, battery, & ignition switch.  Fits all 4 cyl. models 1957 thru 1979 with rubber plug on starboard side of lower cowl, and all 6 cylinder models 1966-79.    Also fits 20 HP 1973-79, and 40 HP 1970-79 Electric start models.  20 ft. long.