Help with a simple battery charger

I'm trying to reconstruct this battery charger. It's a two voltage output, 6v or 12v. I have just a portion of the diagram. I'm just not sure where some of the components go. I have a diagram in image form (gif, jpg, and png). I attached a png image for anyone in this forum to review. I have searched all over the net, and looked at hundreds of charger circuits to no avail, when I happened to find this forum. I'm have no expertise in this area and was hoping that one of you experts could help. If the image is not clear enough, I can send another. I'm trying to keep down the file and image size.
Thank you in advance.
John

I don't think you need the switch or capacitor. The 5K pot is too high a resistance to drive the 2N3055 base, so I added a transistor in a Darlington circuit.

Russlk,
I appreciate your answer, but you've lost me a little bit as to what goes where. Would it be possible for you to draw out your diagram combined with mine to give the edited or new diagram. I looked up the darlington circuit on the net and as I understand it means that the charger would read the batery voltages automatically. Could I leave the ammeter and voltmeter in the circuit? As I said, this is all new to me.
Thank you, John

Darlington refers to the transistor configuration. I did forget the ammeter and voltmeter, see the corrected schematic, above.

Sir, I thank you.
John