SubDyn's Structure Equivalent Stiffness and Mass Matrices at the TP reference point (KBBt and MBBt)
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KBBt
                            X              Y              Z              XX             YY             ZZ
             X    0.168077E+08   0.810000E+02  -0.120000E+03  -0.374475E+04  -0.489520E+09  -0.125460E+05
             Y    0.922500E+02   0.168423E+08   0.264000E+03   0.490343E+09   0.463325E+04   0.355100E+04
             Z   -0.454500E+03  -0.325000E+03   0.171438E+10  -0.399920E+05  -0.999200E+04  -0.159297E+03
             XX   0.840000E+02   0.490341E+09  -0.245760E+05   0.559747E+11   0.291600E+06   0.503960E+05
             YY  -0.489509E+09   0.848000E+03  -0.204800E+04   0.279616E+06   0.559516E+11   0.752608E+06
             ZZ  -0.844800E+04  -0.138240E+05  -0.219459E+04  -0.448640E+06   0.610848E+06   0.259030E+10
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MBBt
                            X              Y              Z              XX             YY             ZZ
             X    0.501355E+06  -0.328125E+00  -0.343750E+00  -0.525391E+01  -0.993881E+07   0.182266E+03
             Y   -0.316406E+00   0.501091E+06  -0.156250E+00   0.993163E+07   0.151367E+01   0.303164E+02
             Z   -0.492188E+00  -0.632812E+00   0.216124E+06   0.339062E+01   0.400000E+01   0.182301E+01
             XX  -0.540625E+01   0.993163E+07  -0.900000E+01   0.238542E+09  -0.659375E+02   0.877789E+03
             YY  -0.993881E+07  -0.375000E+00   0.100000E+02  -0.721250E+02   0.238738E+09  -0.488506E+04
             ZZ   0.182312E+03   0.302500E+02   0.155676E+01   0.884750E+03  -0.489050E+04   0.212279E+08
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Rigid Body Equivalent Mass Matrix w.r.t. (0,0,0).
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MRB
                            X              Y              Z              XX             YY             ZZ
             X    0.985034E+06  -0.751953E+00  -0.645312E+01  -0.238750E+02  -0.343615E+08   0.435062E+03
             Y   -0.742188E+00   0.984484E+06  -0.271875E+01   0.343383E+08  -0.246875E+02  -0.119812E+03
             Z   -0.650000E+01  -0.312500E+01   0.985020E+06  -0.960000E+02   0.293000E+03   0.162916E+02
             XX  -0.243125E+02   0.343383E+08  -0.142637E+03   0.190951E+10  -0.132500E+04  -0.382876E+04
             YY  -0.343615E+08  -0.265000E+02   0.302375E+03  -0.129600E+04   0.191049E+10  -0.174080E+05
             ZZ   0.435225E+03  -0.119980E+03   0.159707E+02  -0.382538E+04  -0.173999E+05   0.563578E+08