You can always solder to the pads that the RCAs use. Maybe you have to remove the RCAs, but that’s not really a big deal.Pity, that the new evaluation boards still dont have some sondering fields for some pin headers instead of the RCA connectors. Or in addition. My dream was a "Bose 4401 ready" version.
Thats what I did with my two evaluation boards. But the footprint of the RCA connectors is special and does not fit to the prototype boards.You can always solder to the pads that the RCAs use. Maybe you have to remove the RCAs, but that’s not really a big deal.