My guess is that an open M1 (so you have a hole) would be to lift the bar as for a M1, but instead of knitting into the back, you knit into the front, the longer part that we always wish we could knit into but can't for an M1 because it will leave a hole. Whew.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry