BTE/BADI/Exit to populate BSEG-KUNNR & BSEG-LIFNR on GL lines while posting document from FB60

Hi Experts ,

In my system, FI documents created from MIRO/FB60 invoices only have vendor number populated in items where bseg-koart = 'K' (vendor accounts). What I need is to have this vendor number in other items where bseg-koart = 'S' (G/L accounts).

I tried BTE'S 00001020 , 00001025,00001030,00001050 . But they are failed to update the date in BSEG .can i do it with any user exit or another similar technique?

Please help me on this .