Side note with TF card issues. I flashed the OpenWRT image to the TF card, but apparently it wasn’t enough. I had to repartition/format my TF card to MBR ExFat before flashing the OpenWRT image on a macOS. H68K is only able to boot from MBR structure disk.
On different OS you may have to use other commands to set partition structure. On macOS I was able to set structure only when reformatting/erase.