If you really are interested, just take the shop and if you don't like it, just tell them you had no way of knowing what you were signing up for. I don't like to sign up for shops and back out and it seems like you might be this way too. But if you are not given any information and there is no one to contact, then what alternative do you have? Did you try finding a phone number and calling them and telling them what you see on the job board and asking questions? I know you cannot call all MSC, but some do answer the phone and are helpful.