How do I get past the hatches at South and East Connection

Hint 1 of 14:

You should know by now that slots are for forms.

Hint 2 of 14:

Check Level 7 for one.

Hint 3 of 14:

It's in the trash can in the Printing Plant.

Hint 4 of 14:

However, it's wrinkled and you can't use it as is.