Originally, Charioteer used the same turret traverse as Cromwell, i.e. an engine driven hydraulic system, albeit with a much heavier traverse box.
The Jordanian vehicles were modified to a pseudo Sherman system using a 24V (Charioteer was 12V) installation. It consisted of an Oilgear traverse motor, pump and controller powered by seperate batteries charged by a generator in place of the original hydraulic pump. This was all coupled to a Logansport hydraulic motor fitted to the Charioteer traverse box.
The complete system was put together by Chris Wilkinson using parts he had in stock. I remember him telling me about it all years ago. ISTR he sold them 50 sets or so.