Flash ROM without unlocking bootloader?

I am using the Nvidia Shield in a digital signage type setting. I will be purchasing hundreds of shields for my kiosks and am looking for a faster way to flash the ROM. Specifically is there a way to flash the shield with a custom ROM without unlocking the bootloader? Are there internal jumpers or code that overrides the bootloader function?

Any ideas on the best way to do this?

Hello,

I replied to your first post.

https://devtalk.nvidia.com/default/topic/1043802/other-tools/flash-rom-without-unlocking-bootloader-/

Best,
Tom