That case might be constructed the same way mine is. This is what I did to cable manage it.
A: Take off the other side of the case (the one with no window)
B: Find out which cables you need to hook up and separate them from the ones you don't need.
C: The cables you don't need you should be able to fit on the other side of the PSU, the part on the same side as the door with no window. Zip tie them together so they are neat, and then use another zip tie to attach it to the case frame somewhere so its tight to the PSU.
D: Make sure the door still fits on with the cables hidden near the PSU
E: To organize the cables you do need first determine which side of the case you need to run them down, either the side with the drive cage or the other side near the back plate of the mobo.
F: For cables on the side near the back plate I attached them first to the board, then I bunched/shortened them with a zip tie so they were either flush with the PSU or hidden by the cpu fan.
G: The cables on the other side near the cage are basically well, hidden behind the cage, tied again with zip ties to parts of the frame so they are hidden, flush with the frame and don't move around.
H: Periodically check to see if the door (the one with no window) Still fits on, if not you will have to reorginize them till it does.
I: Attach the door and that should be it.