Changing Business Group on the Financials Options form HR Tab in Payables

Hello Experts,

We have Multiple OUs and during our initial implementation for specific OU, Under HR tab of Financial Option in Payables, the Business Group has been assigned wrongly.

How do we point it to correct Business Group.

Ex:

US Payables Responsibility-->  Financial Options --> HR Tab--> US Business Group

UK Payables Responsibility-->  Financial Options --> HR Tab--> US Business Group   

We want UK responsibility to read UK business group.

Many thanks in Advance,

Satheesh