Cut Yarn, Join Yarn Working in the Round

Hey everyone.
I’m currently knitting a sweater for my cat (cats need sweaters too) and I’m confused by the instructions. I am knitting in the round in 2x2 rib and I just started making armholes. The instructions say: “Continuing in 2×2 rib, work back and forth on C stitches for D rows, this will be the material that runs between the cats front legs. It will be referred to as the chest piece. [B]Cut yarn leaving a tail to weave in later. Join yarn and work the rest of the stitches in 2×2 rib for D rows[/B], this will be the material that goes over the cats back. You should now have a tube that splits for the arms and is of equal length chest and back.”
(D = 16, for me)

I’m finished knitting the “material that runs between the cats front legs.” (I stopped knitting in the round and knit 20 sts back and forth for sixteen rows.) I’m now at the part that is in bold and I’m afraid to cut my yarn and mess the whole thing up!

Do I bind off before I cut? How do I join to knit the rest of the stitches?

Here’s a link to the entire pattern for reference.

Thanks in advance!

Leave it on a stitch holder for now, it looks like you’ll knit them again after you’ve knit the back and will join back to front after leaving holes or slits for the legs. But since it says ‘leaving a tail to weave in later’ you won’t be needing that yarn. You can cut it, or you can just use another end of yarn to work the back sts if you think you may need to redo the front piece and will need that yarn. I do this a lot, I don’t cut until I’m absolutely sure I won’t have to redo a portion.

How do I join the yarn to work with the other stitches? I’m kind of stuck knitting back and forth on the chest piece.

When you get to the end of a RS row, don’t turn, just knit the other sts off their needle or holder. Once you’ve knit all the way around the work is joined.

But wouldn’t that close my armholes? If I were to cut the yarn, how would I begin knitting the other stitches (the sixty or so that [I]aren’t[/I] part of the chest piece)? They have no beginning or end. Maybe I should upload a picture to show what I mean.

You’ve been working on the back for a few inches right? So that adds some length, which should be the same as the length on the front sts.

The way the pattern is written, you work in the round, then work on only the front sts for a bit, this is where you break the yarn. Then you work on the back sts for about the same length as the front sts, maybe a little more, then you knit all the sts in the round again.