No, install another screw more behind the stun gun and abandon the screw with the black heat shrink. Back that screw out and cut it off short so it doesn't interfere with your gap. Replace it in its hole as a filler plug. [SEE BELOW]
Then, disconnect all your HV wires and do this...
- connect the top stun gun terminal straight out to the top left spark screw
- connect the bottom left spark screw straight across to the right bottom spark screw
- connect the top right screw back over to the other stun gun terminal
Make sure your gaps are close, using longer screws if you need to. Should spark for a lifetime....
EDIT: Actually no. You had better take the middle screw out completely and plug the hole with epoxy. I'm afraid it might still cause a spark bridge there.