the form asks for all kinds of info about the marital history, child care etc. You will also be asked to sign permission for all professionals (doctors, school, etc) to allow the OCL to contact and receive information from these parties.
If you have other evidence that supports your position, you should provide this to the OCL caseworker once you meet them.
if/when you get accepted, make sure you sit down with your lawyer to discuss how to best present your case.