I had to look up 'taint' in the Urban Dictionary. To save anyone else the trouble it means the perineum.
To answer the question the hand and perineum are probably amongst the safest locations ever, to site the two electrodes.
However, because of the distance between the electrodes and therefore the mass of tissue it is unlikely that there will be any specific stimulation anywhere 'along the line', even with the power turned right up.
The most likely outcome is a severe but not dangerous jolt if a pad or connection comes adrift. There may also be some random and unpredictable muscle jumping.
If brosus is seeking erotic stimulation it is very unlikely to succeed with that set up.
brosus should read http://www.zity.biz/index.php?mx=forum;ox=display;topic=13819 here on Zity,
and http://www.aclovin.com/WebRoot/Store24/Shops/17750628/MediaGallery/Electrosex.pdf
E-stim should not be used where demand led medical devices (Pacemakers etc) are in the body, nor in the vicinity of metallic prostheses (hip joints etc) and never attached to metallic jewellery.