On one side of the arm bearing the sword is a weapon trophy and a heap of cubic stones.
Quote from the “Chevalier d’Orient ou de l’Epée” degree (‘Knight of the East or of the Sword’) in the Bonseigneur collection. It does appear to describe this odd detail on an image in the Kloss collection, just not why these cubic stones appears to be connected by a rope.
Collection (1844) of Georg Kloss (1787-1854) (Collection de 84 tableaux, Kl.MS:XXV.1)