After comments that they can be fiddly to rig I thought I'd pass on a few tips for easy rigging!
Apologies for the out of focus shots - it was a rush job
Treat the hanger as a 90 degree bend and push in through the ready made hole...
..it looks like this...
..gently pushing towards the tail rotate through 90 degrees until the hanger appears through the belly slit..
... offer the hook up like this...
...and slide it round until itsits in the 'u' shaped part of the hanger..
..open the belly slit slightly and tuck the top of the hanger underneath..
..and keep rotating until the head is the right way up..
..bend the body so that you can put the hook point straight through the body..
.. it can be fished with the hook point exposed in less weedy or snaggy swims..
..or truly weedless with the hook point nipped into the skin of the body
Tie on, cast into water .....hang on!!!!