Polarity on Gamut Phi Loudspeakers

Does anyone own a pair of Gamut Phi loudspeakers?
I recently purchased a used pair, but the nuts on the binding posts were in a sperate bag (not screwed on to the posts). There do not seem to be any markings on the speakers to identify + and -, and the pictures on the web have shown the red/black nuts on both the left and right posts. Can someone tell me which way round they should be.