How to default Invoice match option to PO in PBWC

Hello All,

I am trying to set the value of Invoice match option to PO as fixed for all PO's created through PBWC.

R12.1.3 is the application version.

Existing setups are,

1. Supplier site  Invoice match option= Receipt

2. Supplier         Invoice match option= Receipt

Critical consideration here is, i do not want to disturb above setup for various reasons.

Suggest your valuable inputs to achieve.

Thank You.