As I understand it, you're asking how someone could get electrocuted if they touch a conductor that is already connected on both ends to terminals.is electrocution possible from touching a good conductor (much lower resistance than the human) that is connecting terminals.
(electrocution) would the current flow through a person when it is already flowing through a copper conductor that is connecting the terminals.
either in a capacitor or battery or AC
is electrocution possible from touching a good conductor that is connecting terminals