Can I have the sources for System Max V on Arria 10 dev kit board (U16)?

In our project we would like to buildin parallel to the HPS also NIOS2 with peripherals such as UART (different than the one connected for linux J10 UART1).

So the next candidate can be J25 DB9. In schematics J25 connected to Max V.

How is it connected to U23 A10? to which pins?

thanks,

Noam