The CAN/RS485 ports are used for BMS to Inverter Communications
The RS485/RS485 ports are used for battery to battery communications
The RS232 port is used by SA or PC based monitoring software.
For the SunGoldPower batteries you would want to connect SA to the RS232 port on the master battery.
In addition you can download the SOKTool.exe software from (use last link at bottom of page):
Full instruction manual for the SOK SK48V100 server rack battery. Everything you need to know is contained within this document!
www.currentconnected.com
This is the cable I use
You can monitor the batteries using the RS232 cable connected to your computer or SA. When connected to the RS232 port on the "Master" battery you can monitor all batteries in your stack. You can plug into the RS232 port on any other battery to monitor just that battery.
The SOKTool software will show you a great deal of info on each battery and is good for troubleshooting any charging or other issues you might have with the batteries. In addition you will be able to get a more detailed description of any alarm conditions