Gold Plated 7A DC-099 5.5 x 2.1mm 5.5*2.5 DC Power Female Socket Jack Panel Mount Connector Adapter
https://www.vogueparade.com/shopping/EN/5/1/1005003741814285/gold-plated-7a-dc-099-55-x-21mm-5525-dc-power-female-socket-jack-panel-mount-connector-adapter//