Use the last illustration. Front panel wires are labeled and color-coded - white is usually GND (-). Your case may have different abbreviations and wiring. You need to install the PWRSW and RESET. If you want to see the HDD activity LED, install the HD-LED; the same for PW-LED, which indicates that the HDD(s) have power - they are actually powered through the 20/24-pin PSU wiring harness.