In my experience there's nowhere, previously I had received 100% for platinum as if it were a QR coded flight but my current DONE5 isn't earning that much anymore. I'll give you my figures from the past 2 weeks as a plat on AA coded and you can see if there's a pattern:

All fare class D:
AA/AT CAI-CMN 8012 avios
AA/AT CMN-JFK 12632 avios
AA/AA JFK-DCA 746 avios
AA/AA DCA-DFW 4172 avios

Looking at this looks like it's about 40% bonus now, YMMV