It was a rather simple plan, in that, they had not been bothered to really plan it out all that much before trying it. They were too hopeless, too desperate, if Harry and Hermione were ripped to pieces in the space time continuum then so be it, there was nothing left for them to live for at this point anyway. So with Hermione’s beaded bag, Harry’s backpack with the same charms, their wands, the sword of gryffindor and a whole lot of dark magic, they left 1996 and arrived in 1943.