The first thing to do is simply run back to the Rogue Shadow and you will find Holocron 47.  As you leave this area, there is a panel on the left that you will be able to tear off using the Force.  You will find Holocron 48 there. 

Nothing to do now but take the elevator down.  Now, you will see a bunch of robots coming to get you, so try and take them all out.  Keep going until you get to the four-legged droid with all of his surrounding creeps.  The four-legged ones were difficult, but if you take them on alone, just levitate them and keep throwing your lightsaber into them.   

In the back of the room there is a health tank and Holocron 49 stashed in the corner.  There are also some rectangular crates that must be destroyed, and this will reveal Holocron 50. 

Go ahead and leave the room through an exit that you haven’t tried before, and then go on to destroy all the robots in your way.  Somewhere in this area, right behind one of those tall holographic droids, is a panel that you need to rip off to reveal Holocron 51.  You will then find a computer panel that stands out, so destroy it with your lightsaber and Holocron 52 will be waiting right behind it. 

Eventually, you will find an area with more robots and a big four legged one as well. There is a panel nearby that has Holocron 53.  Make sure you grab it before using the Z thing to clear the area. 

From there, you will enter a large area where you need to take out a specific number of Junk Golums, and then a large Junk Behemoth.  Dang, is this guy tough, or what?  Well, yeah, he is.  However, you should be able to wear him down.  Don’t let him get too close to you is probably the best advice I can give.  A little lightning does the trick. 

If you destroy the crates all around, you will find Holocron 54.  You will also find a Health Holocron near this particular one.  In one corner, there is a pile of a lot of junk, and here you will find Holocron 55. 

Go up the only ramp out from here.  You will then see a cutscene, and be in a room surrounded by bad guys.  There will be a ramp up from there, and by a steam vent will be the location of Holocron 56 behind a big bunch of clutter.