Pentax DSLR cable shutter release from hands-free cell phone kit

Step 5 Mount stuff

This may be the trickiest step. Maneuver the three controls toward their respective spots. A long pair of needle-nosed pliers help out a lot. Also, the switch has a little groove that the washer uses to stay straight. You'll have to see it. It can be tricky. Tighten them all down and you're set. Test again of course.