there is no captive ball. it closes when there is a captive ball or when a ball enters the deep 4 alley.
the free ball gate is located on the right side middle of the playfield in line with the plunger lane. it is closed to the deep 4 alley and opened to the plunger lane when a pinball is in the deep 4 alley. it is opened to the deep 4 alley and closed to the plunger lane when the deep 4 caper gate is opened. the function of this gate is to prevent a ball from entering the deep 4 alley if another ball is already present there.
the right 