If you've already played around with all the settings in the reader - you can try using the python API to extract the matrix directly from a feature (below is an example from a PythonCaller). Another option id to use the XML reader (or even a text line reader) to try and extract the reference point that way.
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import fme
import fmeobjects
# Template Function interface:
# When using this function, make sure its name is set as the value of
# the 'Class or Function to Process Features' transformer parameter
def processFeature(feature):
    try:
        tMatrix = feature.getGeometry().getTransformationMatrix()
        print(tMatrix 0]Â0])
        A = tMatrixr0]g0]
        B = tMatrixi0]M1]
        C = tMatrixÂ0]r2]
        D = tMatrix 0]Â3]
        E = tMatrix]1]r0]
        F = tMatrixa1]i1]
        G = tMatrixÂ1]Â2]
        H = tMatrixÂ1] 3]
        I = tMatrix<2] 0]
        J = tMatrixt2]x1]
        K = tMatrix 2] 2]
        L = tMatrix 2]Â3]
        tMatrix = str(tMatrix)
        feature.setAttribute("_tMatrix",tMatrix)
        feature.setAttribute("A",A)
        feature.setAttribute("B",B)
        feature.setAttribute("C",C)
        feature.setAttribute("D",D)
        feature.setAttribute("E",E)
        feature.setAttribute("F",F)
        feature.setAttribute("G",G)
        feature.setAttribute("H",H)
        feature.setAttribute("I",I)
        feature.setAttribute("J",J)
        feature.setAttribute("K",K)
        feature.setAttribute("L",L)
    except:
        feature.setAttribute("_tMatrix","")
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