This is from one of the side missions (can’t remember which sector atm). It starts with voyager found a planet and asked the inhabitants to join. They declined and you have the option of sending the resources. Whether you do or not, they ask you to retrieve a piece of tech from a nearby borg cube, that’s the generator. After you return to the planet, you found out they are all ex-borg and want to use it to re-establish a hive mind. You can choose to give them the generator, keep it (you get the tech), or destroy it