Sorry, been away for awhile. The temp sensors are labelled T1 and T2. They are bottom center of the board, right outbound of the bottom two screws by the ISL chips that control the 6 phase FETs on each side.

You could ignore them by setting the temp on BFGMiner.conf to 200 or so, but make sure the temps on the chips really are reasonable before you do this.

C