  Let $$G_{6,3}=\langle a_0, \cdots, a_5| a_{i}^{3}=id, a_{i} a_{i+1}= a_{i+1}
a_{i}, i \in \mathbb{Z}/6\mathbb{Z}\rangle$$ be a hyperbolic group with
boundary the Menger curve. J. Granier \cite{Granier} constructed a discrete,
convex cocompact and faithful representation $\rho$ of $G_{6,3}$ into
$\mathbf{PU}(2,1)$. We show the 3-orbifold at infinity of $\rho(G_{6,3})$ is a
closed hyperbolic 3-orbifold, with underlying space the 3-sphere and singular
locus the $\mathbb{Z}_3$-coned chain-link $C(6,-2)$. This answers the second
part of Misha Kapovich's Conjecture 10.6\cite{Kapovich}.
