Donny,
Here's what is on my '69 Malibu. It is a 350/300 car with h.d. battery and alternator, so I'm guessing this isn't the normal for 69 small block Malibu.
Part numbers are: positive - 6296702MP, negative - 6296750YF. The negative wire is approximately 34" long and attaches to the rear alternator bracket/thermostat housing mount.
I've got a call in to a buddy with a low mile original Malibu to see what cables his car has.
Phil Woj.