Count each stitch, the first one you knit from the left needle and the second one you knit from the left needle. That's two stitches from the edge. The next two stitches, #3 and 4 are the ones to ssk.
That'll be 2sts in from the very edge (it's not two sts in from the edge stitch but two sts in from the edge).
But again, this is generally a personal preference. See what it looks like and if you like the look.