What is the appropriate way to set up a fixed NACHA amount with the remainder going to a check?

Set up one payment method as follows:

Name: Direct Deposit

Type: NACHA

Priority: 1

Balance Amount: 75.00

Did not set up another payment method, so I expected the remainder to go to a check. The entire net pay went to the direct deposit. What is the appropriate way to set up a fixed NACHA amount with the remainder going to a check?