Binding off in I-Cord

I’ve used this bind off for the top of a few bags, and I never can get a nice join for the first 3 stitches that I cast on to start the cord, and the final three that are bound off. I’m supposed to sew them together, and it’s always lumpy and funny. I think my final bind off is weird.

What is the best way to finish an I cord bind-off. Do I pull that thread back along to start the binding off at the reverse end, like I would if I were continuing on in I-cord, or would I turn my work around and bind off starting at the stitch where the yarn is coming off of it. (convoluted question I know)

I think there is a tut. on Knitpicks community.