But Shimano does not give any dimensions so for OP question those diagrams are not giving an answer.

Hollowtech II is supposed to be standardized so any MTB Hollowtech II bearings should be interchangeable (Deore, LX, SLX, Deore XT, XTR).

Maybe the thickness of LX left crank arm (measured at the axle hole) plus the thickness of the LX spacer equals the thickness of SLX left crank arm.

I have an SLX crankset and it does not have those spacers that LX crankset has (on both sides).