As this is a single cable system, the power source would be further down the valley, which would rotate the entire system (an endless rope in effect). The terminal is pictured in John's photo, this had a large pulley where the rope changed direction, and a shunt rail which is what the carriers are resting on now. The load was suspended on the carriers, which had an inverted V shaped saddle so they sat on the rope and were pulled along by it. As the carrier approached the shunt rail the wheels caught on it, and the carrier was pushed onto the shunt rail and the V shaped saddle was no longer resting on the rope so the carrier and load stopped.
Hope that makes sense... ::) ::)