Eric - I was puzzled by this as well but Chris posted his RSI-9 board in a previous post. That unit must have been in the early 2022 year where they were still making the transition to the G12. The 393GS was only manufactured for the 23 model year so is odd that it has a RSI-9.
Many of the folks in this group dont use Facebok so the pinouts for both the G12s and G6 are located at this link:
I am also experimenting with a “FILES” section that should be in the left side of the menu. Discourse isnt that friendly with a location for files so this is currently a link to one of my Google Drives.