Depending on your battery types, the cable connection might be different, as shown below.
4.7. Assembling the PV-side Electrical Connection
About this task
⚫ The inverter cannot be used with functionally earthed PV arrays.
⚫ A positive connector and a negative connector are provided in the accessory bag.
Prerequisite
⚫ The PV array is properly insulated to ground before it is connected to the inverter.
⚫ Select cables according to the below specification. For details, refer to the inverter user manual.
⚫ The positive cable is connected to the positive side of the solar panels, and the negative cable is
connected to the negative side of the solar panels.
⚫ The DC switch on the inverter is in OFF position. For further safety considerations, use a reliable tool
(such as a lock with a key) to lock the switch, so that others cannot unlock it easily.