INA226: The solution of current measurement for 54V on high side application

Hi team

My product needs to use current measurement in 54V/1A environment

I find the TI Designs as follow

40 V to 400 V Uni-directional Current/Voltage/Power Monitoring Reference Design
https://www.ti.com/lit/ug/tidu849/tidu849.pdf

I have some question:
1. What is the RSHUNT resistance value?
2. Is the wire link correct on high side?
3. Pls help to check the schematic diagram

Thank you