You MAY be able to get away with using the 5V from the PSU.
Connection data isnt shown.
Spec for a similar servo motor:
No. Operat voltage: 6V;8.4V
4.1 Idle current: 5mA; 5mA
4.2 No load speed: 0.17sec/60°;0.13sec/60°
4.3 Runnig current: 400mA;510mA
4.4 Peak stall torque: 58.5kg.cm;70kg.cm
4.5 Stall current: 8.5A±10%;10.4A±10%
4.6 Working voltage range: 4.8-8.4V