Erik,
Tekton provides both options. I don't know why they short the 2 hots and the 2 grounds internally on speakers set up for biwire only but they do. My speakers were biwire only but were not marked, I got that verbally from the original purchaser. I confirmed it and removed the jumper to allow some experimentation with B1-amping but I don't routinely biamp or biwire.
Jerry