You shouldn't play with electricity in regions of the body where the skin is not intact. Proceed at your own risk - all responsibility hereby waived! :)
I have replaced the scrotum electrode by tying the wire to a 5 mm barbell, it works quite fine. I have tried this with my PA ring, and it is quite effective, but not much more. Unfortunately, the wire is too short to go there with my cage, and mine is permanent, no screw to tie the wire.
Be careful:
- Piercing must be old, and skin fully reconstructed
- all levels of "stimulation" must be redefined to your own capabilities to be safe, and also bearable
- keep in mind that something you can bear easily with a single pulse, can be much much much much more difficult in pulsed mode. Repetitive pulses can change bears into kittens, trust me