godot/editor/icons/Slot.svg

<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16"><path fill="#5fff97" d="m9 3v2h4v6h-4v2h4 2v-10h-2zm-3 1v3h-5v2h5v3l2.5-2 2.5-2-2.5-2z"/></svg>