The two figures on the castle terrace are Arcadian (right side of the castle) and Boeotian Atalanta (left side of the castle), as can be seen from a very extensive overview of sculptures in the castle park in Wikipedia de.wikipedia.org /wiki/Liste_der_barocken_Skulpturen_und_Brunnen_im_Schlossgarten_Schwetzingen. The figures are made of lead in a gold setting and represent virgin hunters from Arcadia and Boeotia.