Unfortunately, that jacking plate does not exist on the 90 series M3. There is a section of subframe just to the rear of the diff cooling vents, but it's hard to access, and it's not perfectly flat. A piece of 6X6 lumber cut to fit would probably work. If you drive the car on some small ramps, or jack it up enough to place about 4" of planks under it, I believe you can find a suitable jacking point either at a point near where the lower control arm attaches to the frame, or the center portion of the differential, then placing the stands at the rear side jacking points.
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