how i can pass value
when user press confirm button in sale order

picking is generated (stock.move)
i want to pass value from sale.order.line to stock.move while press confirm button ....

i hav custom field in sale.order.line and want to pass in stock.move custome field

how i can pass value while press confirm button in sale order form view

function use is
def action_confirm

but i can't find any dict to pass value in that function ...

i'm using Odoo 13