The majority of Grapple Voltage Terminals in Corruption appear on the Pirate Homeworld. One is seen in the Command Courtyard, powering shields blocking access to the Skyway. An Assault Pirate Trooper is seen disabling the shields by interfacing with the console and then walking into Skyway Access before the shields come back up. Samus does not have the Grapple Voltage at this point, but even if she did, there is a constant downpour of Acid Rain in the Courtyard, which renders safe navigation impossible without the Hazard Shield.