[flatfour]

The two jack sockets are simply a 12volt take off point as suggested. I used to have a DB2 back in the 1960s. Mine was a 1952 DB2 fixed head coupe, the drophead being very rare and I can't recall their being built till 1952. I'm surprised this car is dated 1950. It would be easy to tell from the chassis number. It was a delight to drive but you had to be careful not to over rev as the timing chains in those days were not so good so they tended to stretch with time.