Hiya
Spagetti, i use a simple tuna clip attached to one of my weights. Simpy clip one end of the stringer to the clip.
Another way of using your floatline is to use a speed spike. The picture below will explain it better. Simply push the speed spike through the fish's gills and out of its mouth. As you swim forward, the water will force the fish up towards your float. MUCH easier than swimming back to your float everytime you shoot a fish!

Regards
miles