ok. time to add those melons.
hint #1: when doing curved piecing, it's always easier to attach an "outie" to an "innie" than the other way around. that's true here, in the drunkard's path ... in anything curvey.
Hint #2: notice those funny little points on the ends of the arcs and melons. they are odd, but very important.
take one of the short arcs and one melon. line up the funny point on one end of the melon with the corresponding end of the arc. make sure the stitching line on the melon is facing up.
do the same with the other end.
then pin the midpoint of the melon to the midpoint of the arc. don't worry about how goofy it looks.