I need to add new button to the system bar in backoffice, in this position:

some ideas?
I now how to create the button but I don't now how to attach it to the system bar, I have the idea but I can't override the OOTB configuration:
<widget id="systemBar" widgetDefinitionId="com.hybris.cockpitng.widgets.common.systembar" slotId="headerArea"
template="false">
<widget id="systemBar" widgetDefinitionId="com.hybris.cockpitng.widgets.common.systembar" slotId="headerArea"
template="false">
<widget id="newButtonId"
widgetDefinitionId="com.hybris.backoffice.widgets.newButtonId" slotId="indicators"
template="false">
</widget>
</widget>
</widget>