Alexey,
I did enter 0, 0, 0 for reference and accuracy (suppose reference refers to Master blue camera 1) and got very similar results for X, Y , Z offsets of camera 6 w.r.t. camera 1 as in original post (around -0.15 m in Z offset).
My point is that it seems that the definition of X, Y, Z location offsets is different ( X to right wing, Y to reverse flight direction and Z down) instead of X right wing , Y forward flight and Z up....
Could you confirm , please?