how to load migration data with Dr/Cr Account provided in load and post them to GL

We have a requirement to load Project Misc cost data as part of migration where accounts will be provided in the FBDI file (shouldn't be derived by the SLA engine) and these accounting entries need to be transferred to GL for posting.

We tried changing the transaction source document option:

1. Accounted in Source application as No and enabling Create Raw cost accounting journal entries-- This option let SLA engine derive account and not using Raw cost DR and CR accounts used on the FBDI import file.
2. Accounted in Source application as No and disabling Create Raw cost accounting journal entries- This option put transaction not eligible to generate accounting entries.