Does anybody know what exactly these terms refer to:

Rotary inertia about the 1-axis of the section, (ρI)11
Rotary product of inertia, (ρI)12
Rotary inertia about the 2-axis of the section, (ρI)22

As referenced by the *SECTION INERTIA keyword per this page of the manual: https://help.3ds.com/2023/english/dssimulia_established/SIMACAEKEYRefMap/simakey-r-sectioninertia.htm?contextscope=all#simakey-r-sectioninertia

I have confirmed by hand these terms do not have units of ML2, so I know it's not the mass moment of inertia / second mass moment, thus I'm wondering what they are.

Thanks!