Red and Green fused together are the two coils of the humbucker. If you wanted to coil tap / coil split, you'd separate these two. If not, insulate them so that they don't touch anything and leave them alone. From your description, white will be hot and black / bare will be the earth. Looking at the diagram - your white wire will be the black from the diagram - your black will be the grey from the diagram. Hope that helps.