What exactly should be in this type of contract? Well, firstly you need to be aware of any laws in your country regarding employing people. It is likely these laws will override your agreement so it makes sense to line them up so they match. Then you need to put the basics in there. This might include hours of work, what their role is and how much they are going to be paid. After this, it is a matter of adding some other clauses to protect both you and the employee. This could be to do with dismissal and other situations that might arise.
This is where a sample template can also help. You can search for a commercial lease agreement sample for your state to help you get a good idea of what your lease agreement should look like, of what is required by law and of what you should add to your own. Make sure to find a few of good ideas to give you as many ideas as possible about how to put together this form.