I would place the four frames of brood you have in the centre of the box, and if possible add some frames of collected honey/pollen. For the remaining space in the hive, add frames with foundation (ie. three on each side of the brood).
I would feed them sugar syrup through a top feeder at this stage (a few litres), and keep an eye on their progress repairing the recovered frames, and possibly drawing the new frames. They should still be out foraging and depending on what’s available may be able to build up some additional stores before winter.
You can determine more specifically what’s required for winter based on how they handle the transition over the next couple of weeks.