Bitcoin ATM is not like the regular Banks Atm where funds are kept on the back the machine, the only thing needed is the private key and I'm sure they wouldn't include it for security reasons. The ATM Manchines will only be operational in a way where master public key will be used like the way webs used Bitcoin to receive funds and provide services for people.
What do you mean? I thought Bitcoin ATMs were similar to regular bank ATMs, where you can deposit and withdraw cash. Are you saying thats not the case with Bitcoin ATMs?