The connection is simple, you suggest opening the lower cover of housing. Identify the DIP switch panels from the board.

There are several groups of switches.
From left to right:
#1-#6: ID addressing
#7-#8: baud rate
#1-#4: Protocols
You just need to connect two things.
1) The AC power input of correct voltage
2) RS 485 control cables to your controlling device. e.g. DVR.
Steps:
1) choose the protocol and ID, baud rate

2) connecting the camera
3) connect RS485
4) connect 24V AC power of the pan-tilt
That's all.