If you bought your Phantom1 new, you should have all the instructions you need in the box.
Anyway, no manual is needed for it, just plug the MVS cart in it, then plug the Phantom1 in the console, and that's it.
Plugging carts in it will be hard and annoying at first.
But with time, it will get a lot easier, as your Phantom1 will loosen up and get more "used" to the carts.