15Step 6 Reinstall the front panel for the DCPS.3.4 Installing a Ground CableInstall a subrack ground cable into the rack by using M6x16 screws. Figure 21 shows the subrack groundterminals.Figure 21 – Subrack Ground Terminals(1) Subrack Ground Terminals3.5 (Optional) Installing Dry Contact Signal CablesProcedureStep 1 Press the contact plate using a flat-head screwdriver to flip the metal spring inside each drycontact.Step 2 Connect the signal cables to the corresponding dry contacts.Step 3 Put away the flat-head screwdriver and check that the signal cables are securely connected.Figure 22 – Installing a Dry Contact Signal Cable(1) Contact Plate (2) Dry Contact