Budgeting B1 Hold

We are in process of mapping budget hold B1 to expenses orders (O2 Type) i had gone through process & required help on below issue

 

1. P14102 here we can enter budget By Business Unit wise, is there any option of Budget Uploading from here, because we have 40 business centers & it’s very difficult to enter manually using this application.

 

2.I have tried to entering only selected object accounts which require for mapping , but when we try to make PO for another object account system automatically put the PO into to B1 Hold code as B1 Code is activated for the said business unit , is there any option of selection of only require object mapping?