While it's not possible to see the black hole, I always wanted to know exactly where it is and be able to point my telescope to a position as accurate as I possibly could. So, I used the planetarium software Cartes du Ciel and ESO's video Zooming in on the heart of the Milky Way to make a bunch of screenshots at increasing magnification that should in theory be useful for finding your way at the telescope.
You can also download a print-friendly (black-on-white) PDF version (A4).