So I took the screws holding the SBC out and was able to wiggle the SBC out the console. I then bought a cheap power PC power switch from Amazon. I hooked this up to pins 6 and 8 as per the recommendation and the motherboard documentation. I put the SBC back in place and powered up the console. The SBC didn’t go on when the console powered up, but when I pressed this the external PC power switch, it sprang to life and I had video on the external monitor and the USB keyboard was working. I followed the BIOS reset instructions, restarted the console and the touchscreen came to life and booted up.
Thanks so much for letting me fix. I hope this will help other people out who are having the same issue.