That's an interesting piece right there......
I think I understand how it fits together, but one pic that's just a bit back from the whole grate might be helpful.....no, nevermind....looked at it for the ninth time & maybe got it......
It may work best if you were to load up the box, close up & turn it over....elseways, the chips or small pieces may fall out he bottom?
Second thought, would it be better still to have the smoke filtering out the bottom of the box, to then cover area under the cooking food?
wild guess #3: Could you fit......no, that won't work ......I need one of these right in front of me to figure this stuff out !!!!
option #4: Listen to
@jkolantern !!!!