All Metz 60CT (CT1, CT2 and CT4) use the same battery pack. The battery pack uses either a 6V lead acid dry cell or 6V NiCad. It converts the 6V to about 360V DC to charge the capacitor which is in the head(That's what I measured) as well as supplying 6VDC to the control electronic in the head. The cable has 3 pins.
Chan - the main capacitor is in the pack on CT1/2, and my CT1 pack has a switch in the battery compartment for nicad, agm and wet cells (yes, they once had wet cells for this flash). The head has the control electronics. I have had both apart to rehab different parts.