Thanks Rusty, the "missing" center brake shoe pins or clips was the topic of long discussion on another poster's thread I reviewed when putting the shoes on. Even the shop manual doesn't show this exact setup (although a few other members commented they also had this setup). See this link to picture showing no center pin, nor anything to pin or clip too.
http://pic1.picturetrail.com/VOL1140/4216428/9550254/135564262.jpg