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.
Structure of the organization_ The involved parties should include a well thought organization structure. This should include roles and responsibilities of each partner. Before the start of the business, both parties should have a clear understanding of what they should bring in once the business operates.