@freemo Not to forget that the path electricity can take is relevant. Hard to kill oneself with a current that does not go through internal organs, but one can die to very little power if it goes the wrong way and is offered little resistance (under the skin, wet skin).
@robryk @freemo Valid points, assuming the poles are actually connected by the conductive liquid.
It can be seen as resistances in series and parallel to the current through the heart.
It remains that the path actually has to go through the heart or other sensitive organs - connecting shoulder and hand will hurt, probably do damage, but not kill directly.