Reattaching yarn

I am making a camisole for my granddaughter, the pattern says to bind off and you leave three stitches on each side to attach straps to the top…anyway it says to bind off, and then reattach the yarn to the three stitches to knit the strap…do you just tie on the yarn or what?? Thanks for any advice…
Ginny

Start knitting with the yarn, leave about a 4" tail. The first stitch will be a little loose for a few rows, but you can pull on the tail to tighten up, it won’t come out. When you’re done, weave in the end.