What court papers do i use to submit evidence on a case that my business is named in?

I am a contractor with my own business and one of the companies that gave me work is now being sued for a job that I worked on for them. The plaintiff named all of the businesses involved in doing work on that particular job as cross defendants and I am one of them. As to the work they are being sued for I was not involved in performing. I am trying to figure out how to submit the evidence ( my paper work, bids, contracts, etc... ) to show that I am not at fault for the problems they incurred. Any help would be great