I think there are three buttons involved in controlling that. Tmcc uses accessory control modules (I'm awful with their anogramic naming, it begins with an A and ends in "module"). I think they have isolated points for multiple norm. Open/norm closed. Between the two, you might need isolated relay points ( or an opto isolation, etc if you must ) but near anything can be done with a remote on off imo. The wash controller could be tapped into or just maybe, removed. (Depndends on if boards are in it or just switches.)