Settlement Periods for Service Contracts

Hi Expert !!

I created work declaration successful S/4 HANA Public Cloud . 
 ・Contract Start: 2024/11/1
 ・Contract End: 2025/10/31

In this case, I would similar to run the Settlement Periods from the 16th of the existent period to the 15th of the pursuing month.
The representation is arsenic follows.

Can you summation the fig of options for Settlement Periods? (e.g. "From the 16th of the existent month")

Soma