What G/L Account for Discount in Sales Order

I use SAP b1 in my company. I have a problem to split journal entry when i give discount in sales order to customer.

Example:

I have item with price 1,700. in sales order i give discount 41.23%, so price is 999.09

In journal entry when i create Delivery the value is 1,700. But i want journal entry value is 999.09 to customer credit and 700.91 to discount account?

Any body can help me?