Return a new ``<p:cxnSp>`` element tree configured as a base
        connector.

def new_cxnSp(cls, id_, name, prst, x, y, cx, cy, flipH, flipV):
        """
        Return a new ``<p:cxnSp>`` element tree configured as a base
        connector.
        """
        tmpl = cls._cxnSp_tmpl()
        flip = (
            (' flipH="1"' if flipH else '') + (' flipV="1"' if flipV else '')
        )
        xml = tmpl.format(**{
            'nsdecls': nsdecls('a', 'p'),
            'id':      id_,
            'name':    name,
            'x':       x,
            'y':       y,
            'cx':      cx,
            'cy':      cy,
            'prst':    prst,
            'flip':    flip,
        })
        return parse_xml(xml)