The thing from the Bayou wrote:
^No. Seven knows because she was still in the collective when First Contact happened...
Yet the Borg in 2063 were out of contact with the collective, hence them trying (and failing) to convert the Enterprise's deflector into a transmitter. So there's no way Seven or the other Borg of the 24th century would know how First Contact played out. But they did - because the FC survoivors sent their dignal in "Regeneration"