Audio Research VT200 MK1 and speaker connections

What taps do you use on the Audio Research VT200 to connect a speaker like the Martin Logan Monolith 1 ?

It does not really matter, which ever sounds better in your system. I have tried both the 4 and 8 ohm taps for my SL3s and ended up using the 8 ohm taps. But I really did not hear that much difference.
My question is really what taps do I connect the positive (+)speaker wire be it 4 or 8 ohms and which taps do I connect the negative(-)speaker wire?