GATP BADI:/SAPAPO/IF_ATP_REQ_ITEM_CONF

Hi Experts

does anyone use the BADI :/SAPAPO/IF_ATP_REQ_ITEM_CONF?

I want to use this BADI to change the confirmation date, but according to our company requirement , the lead time is based on the sales origination and  sales order priority to store the customization table, I will use this BADI to read customization table to confirm the remaining quantity. but I have the following questions:

I can not find the sales organization and sales order priority fields in this BADI.

if it is not in the BADI for these fields. how to add these  two fields via which user exit or BADI  and which user exit or BADI ?

thank!