You can see in the picture that they include an eyelet in the belly to tie off a stinger hook. I don't like running a belly stinger on this style of swimbait because a lot of time you'll get bit while running the bait into points and bouncing it off structure. That treble will get you snagged up continuosly. I used to insert a copper dowel into these kind of baits and run line through it to tie a large, round worm hook as a trailer on the top of the bait near the tail. Basstrix 10" swimbait has a similar double hook set up. When I get a chance I'll post a picture of how you can do this, but I'd definetly shy away from adding a stinger to the bottom of the bait. Most fish inhale these baits head first, so the position of this hook on the top of the head is the best set-up.