For some PTZ (Pan, Tilt and Zoom) cameras to move they require commands to be received via a pair of cables (usually UTP) as an RS485 connection.
If your DVR/NVR supports this you will see 2 ports on the green connector block labelled either A and B or + and -
Wire these to the matching cables on the PTZ camera.
For how to set the the DVR/NVR up to control these, please refer to the PTZ guide in the support section for your DVR.