Spitfire fuselage parts ID

I recently picked up a mixed bag of Spitfire bits
In amongst the mix are these two items. They are both slightly different but still similar.
One has a part number of 33027 61 whilst the other has 33027 62 16
I’m led to believe they are fuselage parts but haven’t got a clue on what they are or where you would find them in the fuselage
As you can see both parts have a bend and are not flat

And lastly there was a complete ammo box holder for the wing mounted guns