Return the Y-position of the begin point of this connector, in
        English Metric Units (as a |Length| object).

def begin_y(self):
        """
        Return the Y-position of the begin point of this connector, in
        English Metric Units (as a |Length| object).
        """
        cxnSp = self._element
        y, cy, flipV = cxnSp.y, cxnSp.cy, cxnSp.flipV
        begin_y = y+cy if flipV else y
        return Emu(begin_y)