Defining boundary conditions from previous solution

In the frequency domain RF module, I first computed solution 1. Next, I would like to define the electric field on the boundary for solution 2 (same mesh as solution 1) as the cross product between the unit normal (n) and the H vector from solution 1.

I've tried to set the initial dependent variables for solver 2 to be the solution of study 1, and disabling solver 1. This maps over E and H from solution 1 and I only want the cross product of solution 1 on the surface.