If the capacitor is charged then the battery will explode.
Connect them in Series and you will get 24 volts but the amperage will be the same as 1 battery.
Connect them together in Series. Connect the negative post of one battery to the positive post of the other battery. Then connect the negative charger cable to one negative battery post and the positive to the positive post of the other battery.
No.
12volt
You cant.
Not by connecting them directly, that'd be too powerful.
No
Red is positive black is ground.
No
yes, its should work in a '73
With a 12 volt battery charger that is made to plug into a 220 volt circuit.
yes as long as it is a 12volt battery - i have done it many times.