Disconnecting one side and still using the p-brake will not work, the cables are connected in a 2 to 1 fashion so to speak... disconnecting one side would unbalance the cable where the 2 to 1 plate is and the other side would most likely disengage after a while, if not the first time you used the p-brake. You can however disconnect the sticking side and not use the p-brake... just leave your car in gear