Dubédat's SLE boundary duality conjecture

Let $\kappa\geq 4$, and let $SLE^\sigma(\kappa,\kappa-4)$ be the reflection-symmetric image of $SLE(\kappa,\kappa-4)$ in the upper half-plane. Let $\partial_R$ denote its right boundary, and set

$$\kappa'=\frac{16}{\kappa}.$$

Dubédat's boundary duality conjecture. The right boundary of $SLE^\sigma(\kappa,\kappa-4)$ is an $SLE(\kappa',(\kappa'-4)/2)$. The conjecture is a precise proposed realization of SLE duality through an SLE with force point; the source presents it as proposed by Dubédat and does not claim a proof.