23WRA 50WRHJ is not sw version any more.
You need to look for EPK string. Something like that 45/1/ME701/19///70195Z6/70195Z6/020506154051
Btw. post the bin.
you're overthinking it.
23wra is a variant of the 50wrhj specific to the US M66 06+ R ( can flash it on 05, i run it actually on my personal car )
and he has the proper ols file now