Earlier today I purchased a Kodak Instamatic M6 Super movie camera. It is missing the battery and the cover for the meter, and I am unsure of what battery it runs. I put 3 batteries into the pack on the bottom, and put a cartridge of film on it, and as dumb as it sounds, I have no idea how to turn it on. I tried pressing the trigger, but nothing happens. Is it because I do not have a battery in the meter? And if so, what is the battery I need for it?