This power junction, designated K-H82, was situated within the Breaktown district of Zakuul; you can find more about it at Breaktown and Zakuul. During the War against Zakuul in 3630 BBY, as detailed at 3630 BBY and War against Zakuul, Kaliyo Djannis, alongside the Alliance Commander (see Kaliyo Djannis and the Alliance Commander), strategically connected an ion grenade to the Power Junction. They subsequently detonated this device, effectively neutralizing the Overwatch security system. Further information on the grenade can be found here: ion grenade.