7 of 9 Reactivates Borg Cube - 7 of 9 Hard Wired to Borg Cube separated from the Collective.

From Star Trek Picard Season 1 Episode 8. Realizing that the Romulans plan to destroy the drones on this Cube, which is separated from the Collective, and that the dormant drones are especially vulnerable, she looks for options. As reactivated drones would be useless without the voice of the collective, she finds that she can reconnect the drone's transceivers to form a collective of just the drones on this Cube. But she is hesitant because of the risk that neither she nor the drones would want to disconnect.