R12 Navigation Path for Choose Ledger in AP

I'm trying to find out the navigation path in the Payables Manager responsibility to perform step 2 in the Payables section of the Payables Setup Steps.

Previously in 11i, you'd go to Setup > Set of Books > Choose.  This is no longer an option in R12.  

The user guide doesn’t actually give a navigation path. It states:

To choose your primary ledger:

1. Navigate to the Choose Ledger window.

2. Enter the name of the ledger you want to use.

3. Save your work.

I cannot find the “Choose Ledger” window anywhere in the Payables Manager responsibility.  The closest I get is:

Payables Manager > Setup : Accounting Setups : Ledger Setup : Define: Accounting Setups