I know the LokSound 5 nano with the E24 connector does pinout the Aux10/Wsensor on pin 19.
As far as I can tell only the 58941 (Kato USA wide body) fans-out the Aux10 connection to a solder pad on its carrier board.
Aux10 as an input is not available on the 58923 (nano wired version) breakout board.
I am not sure if aux10 might be available any of the other 5 nano based decoders.
Anyone know?