First off did you stabilize with k-meta and sorbate? This is a must! I am not an expert but I think the juice would be protected as long as your sulfite levels were as high as it should be.
Thanks for the info. I'm new here and I'm lovin' this place. I've found somewhere where I belong. And maybe the wife won't have to listen to me talk quit as much about making wine.
Adding that juice will probably cloud up the wine. Usually you would add it after the wine has finished and been stabilized, so it can all settle and clear together. If you don't mind,though, it won't hurt the flavor.