There there are no straps but there should be a divider that goes inside the bag that divides the 3 ball cups.  If the bag didn't have one contact BP and they will send one out.  Tell them it was missing the divider in the main bag.

I had one of these bags and it just had a padded divider that was held in with velcro.  Like itsallaboutme said, if yours doesn't have one contact them and let them know.

I really liked my Yellow Jacket at first but I ended up getting rid of it after just a few months.  After about a month of average use (2 leagues a week) the zipper on the large accessory pocket on the side started popping open which would cause the zipper to bind so the pocket could not be fully closed (which basically made the pocket useless).  After about 2 months the stitching on the zipper for the shoe bag began to pull loose.  I contacted their customer support and was told to send it back and they would take care of it but I didn't want to have to pay the shipping costs on top of what I had already spent on the bag so I just sold it to a friend of mine whose mother sewed new zippers on it.  As far as I know he hasn't had any further trouble with it but you might want to be real careful with the zippers.