I.R.I.S. 130 - Manual (Page 13)

Fig. 5: Sucker Mount (Optional). Please note, this mounting option may not be suitable for Marine Installations.
4.2. INSTALLATION
To set the baud rate, protocol and camera hard address:
1) Remove the PTZ bottom plate
2) Set DIP Switch for baud rate, protocol and camera address
3) Re-Fix the bottom plate, making sure the sealing is in fact and not compromised.
Fig. 6: Bottom Plate