Battery splash plate
The changes are I think just driven by better production practice.
The punch that makes the hole with the 45 degree step will last longer than the original design, require a bit less force and reduce the need to clamp the plate to avoid distortion.
The pressed bit in the top left corner will require less force than the punched notch and support the extreme top left corner of the plate much better. Again the tooling will last longer.
It is possible that there was more than one source of this piece so it could be that one factory was better at production engineering than the other rather than an evolution thing.
David
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