May be they used tugs ?
In space, weight doesn't exist, so may be it would be possible to use tugs...
Long shot, but you never know !
Nova Squadron, the Elite B-Wing flight group stationed aboard the Nebulon B Frigate 'Oracle', home of the tech library.
'No capitol too large, no corvette too armed. NOVA squadron, for ALL your extermination needs. Our special at the moment - SSDs (See our work with the Iron Fist !) !'
Commander Jon 'DFMD' Adamson - leader of Nova Squadron (B-Wing ID = 'The White Witch')