For each of the archives:
2.1 unzip
2.2 dos2unix the Updat_BMC_OOB.sh script (for bonus points it has different names in each of the archives)
2.3 make the Yafuflash binary executable
2.4 make the script executable
2.5 possibly run them with bash instead of the /bin/sh at the top
2.6 run the Updat_BMC_OOB.sh script fill in the IP user password
You need to update them in order V2 then V3
After this update you can upgrade the BIOS from the WEB UI