ESS Leave Request customization

Dear Experts ,

          I have a customization requirement in ESS Leave Request Application . I have to add an extra input field in the leave request application . So I have opened the SAP lea DC and I am able to find almost 15 components . But I am unable to find the view of leave request application . Can any body guide me how can I find this view and add this new input field in that screen .

  Please find the attachment for the exact picture of the requirement .

  Thanks you in Advance

  Anusha .