This is what I did:
I slipped the left strap into the first clip and sewed the strap to the backside of the same strap (Photo 1).
I pulled a large loop in the second clip of the right strap so I could slip the end of the right strap through the clip again but inside the large loop (Photo 3).
Adjustable straps can be used for many items. I'd LOVE to put one on a beach bag!