1. Parts need

2. Open vent slide

3. Use screw with three washers. If your screw doesn't look like this one you have newer one that doesn't need washers.

4. Thread through center two holds

5. Should come through like this

6. Recess them

7. Fit peice in place

8. Screw in screws

9. Screws should be flush with top of nut

10.

11.

12.

13. Fits like this

14. Cutaway-able part

15.

16.

17.

18.

19.

20.

21.

22.

23. Done!

24.

25.

26.

27.

28.

29.

30.

31.

32.

33.

34. Assembly can be unscrewed as a whole if wanted to unmount for tunneling