SAP WM LTAP update

Hello,

please i want update LTAP /change value of WEMPF field in LTAP table during TO creation.
I found user exist EXIT_SAPLL03T_001 User Exit MWMTO001 End of TO Creation (in Update Task) but LTAP table is not updated / cant be update with custom logic defined in exist for wempf field.

I checked all SAP WM user exits and i cant find possibility how to do it, can somebody advise please ?
Thank you.