if you have restricted your init load with the initial 6 plants, then you'll need to do a new init for the new plant only - the deltas afterwards will "combine" these selections and update all plants
if you haven't restricted your init load on plant, data should come in automatically (without any action on your part)
filling the setup tables without doing a new init/full repair doesn't make sense as that data won't be used at all (unless you do a new init/full repair)