I have two older Sweda Cash Registers, they are Red?

Hi everyone, My name is Margie and I live in Northern CA. I recently purchased two red Sweda Cash registers, one has a Chrome Drawer and the other has a Hand Crank. I'm totally lost on how to even open these darn machines. Does anyone know where I can a Manual for these two machines? Basically it would be nice to even open these two machines. I own a local vintage thrift shop and would love to be able to sell these machines because they are very pretty.