I tried a couple variations, but the one that seemed most parallel to the Gasket example in the help files was
Y, response: score
Part, Sample ID: rater
all others were unfilled Doing this doesn't return an ICC at all.
I just tried changing the rater values to a and b instead of 1 and 2. It actually did give me a ICC of 0, which seems unlikely since the values from the two raters do have a significant Pearson r. There are 185 pairs of scores in the dataset.