  Generalizing our recent joint paper with Vasily Pestun, we construct a family
of $SO(2r),Sp(2r),SO(2r+1)$ rational Lax matrices polynomial in the spectral
parameter, parametrized by the divisors on the projective line with
coefficients being dominant integral coweights of associated Lie algebras. To
this end, we provide the RTT realization of the antidominantly shifted extended
Drinfeld Yangians of $\mathfrak{so}_{2r}, \mathfrak{sp}_{2r},
\mathfrak{so}_{2r+1}$, and their coproduct homomorphisms.
