SPI Documentation

Hi, I am trying to interface a device through RS485 and boughtthis RS485 hat for my Rock Pi E.

The documentation suggests to install Wiring Pi, is this possible with the Rock Pi E?
Otherwise, since it just converts RS485 to SPI. how do we access the SPI pins on the Rock Pi E?
I could not find this information on the Wiki’s GPIO page.

Check this page: