How do you update the BIOS on a thin client,

[JasonzMN]

How do you update the BIOS on a thin client, i have 60 old T520 that need a BIOS update from 1.02 to 1.13 i do not see the template download  in the HPDM i tried to do a it from command line and i get a error  "unable to find the image: BIOS"

this is what i found and how to do ThinPro BIOS flasing

• ThinPro v6 ~ v7
In new HP ThinPro environment, we rely on 2 scripts: hptc-bios-flash and hptc-bios-cfg to
update system BIOS with image file in this softpaq. hptc-bios-flash is designed to deploy
BIOS image file to ESP partition. hptc-bios-cfg is used to change BIOS variable setting
(platform configuration) in ThinPro so the BIOS update utility can flash the System BIOS in
next boot. Below listed a sample procedure of update BIOS:
1. Log in ThinPro as root.
2. Open the X-Terminal.
3. Go to /writable/home/user.
4. Type “hptc-bios-cfg –G config.txt” to get the BIOS config file from system.
5. Set BIOS update from ‘disabled’ to ‘Auto’ in config file.
a. Open ‘config.txt’ with build-in Vim.
b. Find the item, ‘BIOS update’.
c. Switch ‘*’ mark from ‘Disable’ option to ‘Auto’ option of BIOS update.
d. Save the config.txt
6. Type ‘hptc-bios-cfg –S config.txt’ to set the BIOS config file into system.
(If setup password existed, Type ‘hptc-bios-cfg –p PWD.bin –S config.txt’)
7. Copy BIOS M41_0107.bin to /writable/home/user.
8. Type ‘hptc-bios-flash BIOS M41_0107.bin’.
9. Restart the system.

i get stuck at 5 c i do not see "BIOS update = " in the file so i just tried to run the Flash command that's when i get the error