It was built as an interstellar colony ship - even with the ridiculously powerful and efficient drive technology they have in the Expanse it would take many yea

It was built as an interstellar colony ship - even with the ridiculously powerful and efficient drive technology they have in the Expanse it would take many years, possibly decades after reaching cruise speed before it would break at the destination. So I assume the colonists would just wait in a part of the ship perpendicular to the thrust axis during the acceleration burn and then move from that section (which would be now in micro gravity) to the rotating section. Then in reverse for the deceleration.