Is that the order they were in when you got it?  Given the markings, that seems to make sense, although there's no assurance that the physical location of the sockets corresponds to the range of data pins that it covers.    On the bright side, there's only 24 possible combinations in which you could install them. 

Alternatively, find a component for which you know the data pin arrangement (the CPU, or a ROM SIMM socket, if present) and check continuity between the ROM data pins and the known device.   That'll tell you which of the four ranges each socket corrsponds to.   Then if the markings on the chips are logical, the arrangement should be certain.

I like the HH, MH, ML and LL nomenclature.   Later, Apple started using HH, HL, LH and LL, which is confusing as heck, unless one knows that the more significant label takes precedence and most significant is on the left and least significant is on the right.