simple, passive, low-tech solution I would probably do is an 8 position selector switch to dip switches replacement.
https://www.adafruit.com/product/29...sbY2_-vvrOzkWQxxkuNuusBry2rbjE0xoCBIsQAvD_BwE
You could put this on it's own pcb with an extension cable, or just replace the dip switches pcb by putting on the same connector for the wire harness.
Some people like changing dip switches. I do not. i find it cumbersome.
https://www.adafruit.com/product/29...sbY2_-vvrOzkWQxxkuNuusBry2rbjE0xoCBIsQAvD_BwE
You could put this on it's own pcb with an extension cable, or just replace the dip switches pcb by putting on the same connector for the wire harness.
Some people like changing dip switches. I do not. i find it cumbersome.