Ok so I am hoping you have the logic-board and DVD player out.
What you want to do is either lay case in it closed side with the bottom pointing toward you or turn it upside down so you can see inside, what ever is easiest for you.
Your looking at the underside of the bar that had the tabs to latch the side panel on.
There are 6 torx screws, I forgot the size (8 maybe???) even a hex head will fit, just dont go crazy they should come loose very easy.
Here are picks of the front and read torx heads in the rail.
There will be the six of them, they are holding the outside of the shelf plus the plastic rod the the side locking tabs are on.
Next you want to remove the three locking tabs. Just take a small flathead screw driver and pop the rear holding clips off. Very easy to do, DO NOT use crazy force as the clips can be removed easy and you don't want to bend the **** out of them.
Now you want to remove the upper HDD fan system, look for the black screw heads on the rear of the fan on top.
Now remove the three black screws on the bottom of the shelf as one is the HDD fan screw and the other two are the HDD tray screws.
You can do the HDD tray fans if you want but it wont come out until the tray is removed.
Black screw heads as well.
You will have to do some wiggling but it shelf will slide to the back and kinda shift out. It's a pretty tight fit but just take your time and you will get it, DO NOT be imateint and pull and tare. You will bent and brake ****.
After you should have it looking like this
Good luck!