How to enable Journal approval for secondary ledger for a specific Journal Source

HI Experts,

We have 2 ledgers

1. Primary Ledger

2. Secondary Ledger

Requirement:-

We want to enable Journal approval for given Source: Payables & that Journal approval should trigger only for Secondary :Ledger but should not apply for Primary Ledger.

Please advise

Ex:

For Source: Payables Journal Approval should apply for Secondary Ledger but there should be any Journal approval in Primary Ledger

For Source: Receivables: Journal Approval should apply for Primary Ledger but there should be any Journal approval in Secondary Ledger