Are the boilers of Boiler Room #1 identified?

[Seungho Kang]

I am still thinking if the boilers fell straight down one by one while the stern section rotated facing against the bow.
I am suspecting that the boiler location, which looks like an arc, proves that the stern rotated and drifting before it finally sinking.
I marked the boilers red and scaled the stern just right to fit the wreck size.

To prove this, I need exact information about each boilers' original location
Does anyone have some information about this?
And would this be a likely scenario about the stern rotating?

 

[Ioannis Georgiou]

The boilers of BR1 were at the forward double bottom piece. Without the bottom there was nothing which would hold them inside the hull.

 

[Mike Spooner]

So can we take it the BR1 was part of the breaking point for the ship, If BR1 those where the single ended five boilers which were never lite therefore could of not exploded with the freezing cold water. It was the hull structure of the ship breaking away.