I do not recall how many posts you have to make before you can post photos, but it is a small number but larger than one. In other words I won't ask you to post any photos because you can't yet.
But if you provided dimensions of the battery holder you might be able to guess what size battery it is. And if there are any bulbs, they might list the volts and amps or wattage on the bulbs.
This might help on batteries.
https://en.wikipedia.org/wiki/List_of_battery_sizes