Restoring EFI Boot Variables Externally

I have a Wyse Z90 thin-client that I wanted to re-purpose as a router with OpenWRT (which had to be manually installed with the router. For some possibly stupid reason that escaped my mind, I set the boot options except PXE to inactive. Upon reboot, PXE was the only option on the boot list.

I removed the CMOS battery, hopint that it would clear the changes I made. It would seem the variables are stored in some persistent memory as they are still there.

Is is possible to edit the variables on the bin file backups? I've found 2 SPI chips and have backed up their contents with Flashrom on my Linux install.

Any help would be greatly appreciated.
Thanks.

  bios.bin (Size: 2 MB / Downloads: 0)

  otherspichip.bin (Size: 64 KB / Downloads: 0)