As they approached, the battlecruiser switched from using its long-range bombardment cannons to its short-range point defense guns, much as the battlecruisr in enemy group 5 had done.  Legion hid behind Nyx as they got pelted by shots from the guns, poking out occasionally to shoot out a few of the guns.  Though it took a bit longer, they managed to take out all the guns on this side of the battlecruiser.  Realizing that it was futile to continue fighting, the battlecruiser started backing off, giving the cogs a clear path to the freighter.