M1A2sep and M1A1 AIM lower plate upgrade

Do anyone have any documents that the lower plate was upgraded on the M1A2 and M1A1 AIM I have some but they don’t think it enough and I have been looking everywhere here are the ones I have.

Screenshot 2023-08-17 090425

As you can see, they were upgraded 2001 or 2002 onward.
We have a 1999 configured SEP, and it has externally mounted TUSK option.

what about the AIM?

The AIM should have better hull armor