The actual housing where the contact is in do not have an od or os label to determine which be belongs to which eye, is there another way to tell?

Put the lenses on...: Unless a someone is lucky enough to be wearing rigid lenses, which often have a black dot, usually on the right lens; a person could just put the lenses on and check to see which lens gives the best vision on each eye. A second option would be to go back to your doctor, put the lenses on, and ask them to check the "over refraction" to determine which lens is correct for which eye.