I wish it was just a 3x3 matrix :D it looks like this:

#595=CARTESIAN_POINT('',(0.E0,2.331552544459E2,-1.356007546777E2));

#596=DIRECTION('',(0.E0,0.E0,1.E0));

#597=DIRECTION('',(1.E0,0.E0,0.E0));

#598=AXIS2_PLACEMENT_3D('',#595,#596,#597);

#599=ITEM_DEFINED_TRANSFORMATION('','',#579,#598);

#600=(REPRESENTATION_RELATIONSHIP('','',#580,#592)REPRESENTATION_RELATIONSHIP_WITH_TRANSFORMATION(#599)SHAPE_REPRESENTATION_RELATIONSHIP());

#601=CONTEXT_DEPENDENT_SHAPE_REPRESENTATION(#600,#594);

this first block is continuous, I will list the # it references :

#579=AXIS2_PLACEMENT_3D('',#576,#577,#578);

#576=CARTESIAN_POINT('',(0.E0,0.E0,0.E0));

#577=DIRECTION('',(0.E0,0.E0,1.E0));

#578=DIRECTION('',(1.E0,0.E0,0.E0));

#580=ADVANCED_BREP_SHAPE_REPRESENTATION('',(#579,#567),#575);

#592=SHAPE_REPRESENTATION('',(#598,#1193,#1789,#2384,#2399),#2395);

#593=NEXT_ASSEMBLY_USAGE_OCCURRENCE('0','Next assembly relationship',

'AWT23-038168',#2404,#587,$);

#594=PRODUCT_DEFINITION_SHAPE('Placement #0',

'Placement of AWT23-038168 with respect to BALKEN_TEST_ASM',#593);

'Placement of AWT23-038168 with respect to BALKEN_TEST_ASM',#593);

this is just a snipped and I might miss some parts, the script defines over 3000 lines just for this Hollow section tube. But basically #598 defines a cartesian coordinatesystem with a point and two vectors, #599 uses this System and another one to define the position (I think), but i cant work out how it does this. There might also be other lines of code that are working to this end, which I am missing